61502220 has 96 divisors (see below), whose sum is σ = 206082240. Its totient is φ = 15137280.

The previous prime is 61502201. The next prime is 61502239. The reversal of 61502220 is 2220516.

61502220 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (61502201) and next prime (61502239).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 61502193 and 61502202.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2640 + ... + 11400.

It is an arithmetic number, because the mean of its divisors is an integer number (2146690).

Almost surely, 2^61502220 is an apocalyptic number.

61502220 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 61502220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (103041120).

61502220 is an abundant number, since it is smaller than the sum of its proper divisors (144580020).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

61502220 is a wasteful number, since it uses less digits than its factorization.

61502220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8792 (or 8784 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

The square root of 61502220 is about 7842.3351114321. The cubic root of 61502220 is about 394.7270880958.

Adding to 61502220 its reverse (2220516), we get a palindrome (63722736).

The spelling of 61502220 in words is "sixty-one million, five hundred two thousand, two hundred twenty".