61522120 has 64 divisors (see below), whose sum is σ = 155131200. Its totient is φ = 21761280.

The previous prime is 61522103. The next prime is 61522127. The reversal of 61522120 is 2122516.

It is not an unprimeable number, because it can be changed into a prime (61522127) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14391 + ... + 18169.

It is an arithmetic number, because the mean of its divisors is an integer number (2423925).

Almost surely, 2^61522120 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 61522120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (77565600).

61522120 is an abundant number, since it is smaller than the sum of its proper divisors (93609080).

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

61522120 is a wasteful number, since it uses less digits than its factorization.

61522120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3838 (or 3834 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 19.

The square root of 61522120 is about 7843.6037635770. The cubic root of 61522120 is about 394.7696568681.

Adding to 61522120 its reverse (2122516), we get a palindrome (63644636).

The spelling of 61522120 in words is "sixty-one million, five hundred twenty-two thousand, one hundred twenty".