61223610 has 64 divisors (see below), whose sum is σ = 171528192. Its totient is φ = 13694016.

The previous prime is 61223609. The next prime is 61223621. The reversal of 61223610 is 1632216.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6769 + ... + 12971.

It is an arithmetic number, because the mean of its divisors is an integer number (2680128).

Almost surely, 2^61223610 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 61223610, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (85764096).

61223610 is an abundant number, since it is smaller than the sum of its proper divisors (110304582).

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

61223610 is a wasteful number, since it uses less digits than its factorization.

61223610 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6267.

The product of its (nonzero) digits is 432, while the sum is 21.

The square root of 61223610 is about 7824.5517443493. The cubic root of 61223610 is about 394.1301372959.

Adding to 61223610 its reverse (1632216), we get a palindrome (62855826).

The spelling of 61223610 in words is "sixty-one million, two hundred twenty-three thousand, six hundred ten".