61215232 has 80 divisors (see below), whose sum is σ = 139725432. Its totient is φ = 26542080.

The previous prime is 61215229. The next prime is 61215247. The reversal of 61215232 is 23251216.

It can be written as a sum of positive squares in 4 ways, for example, as 47554816 + 13660416 = 6896^2 + 3696^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 112882 + ... + 113422.

Almost surely, 2^61215232 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 61215232, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (69862716).

61215232 is an abundant number, since it is smaller than the sum of its proper divisors (78510200).

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

61215232 is a wasteful number, since it uses less digits than its factorization.

61215232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 589 (or 573 counting only the distinct ones).

The product of its digits is 720, while the sum is 22.

The square root of 61215232 is about 7824.0163599011. The cubic root of 61215232 is about 394.1121585405.

Adding to 61215232 its reverse (23251216), we get a palindrome (84466448).

The spelling of 61215232 in words is "sixty-one million, two hundred fifteen thousand, two hundred thirty-two".