61217232 has 20 divisors (see below), whose sum is σ = 158144640. Its totient is φ = 20405728.

The previous prime is 61217227. The next prime is 61217239. The reversal of 61217232 is 23271216.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61217239) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 637632 + ... + 637727.

It is an arithmetic number, because the mean of its divisors is an integer number (7907232).

Almost surely, 2^61217232 is an apocalyptic number.

It is an amenable number.

61217232 is an abundant number, since it is smaller than the sum of its proper divisors (96927408).

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

61217232 is a wasteful number, since it uses less digits than its factorization.

61217232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1275370 (or 1275364 counting only the distinct ones).

The product of its digits is 1008, while the sum is 24.

The square root of 61217232 is about 7824.1441704508. The cubic root of 61217232 is about 394.1164505863.

Adding to 61217232 its reverse (23271216), we get a palindrome (84488448).

The spelling of 61217232 in words is "sixty-one million, two hundred seventeen thousand, two hundred thirty-two".