55771232 has 96 divisors (see below), whose sum is σ = 130636800. Its totient is φ = 23155200.

The previous prime is 55771229. The next prime is 55771241. The reversal of 55771232 is 23217755.

It is a super-2 number, since 2×55771232² = 6220860637595648, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 207194 + ... + 207462.

It is an arithmetic number, because the mean of its divisors is an integer number (1360800).

Almost surely, 2^55771232 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 55771232, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (65318400).

55771232 is an abundant number, since it is smaller than the sum of its proper divisors (74865568).

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

55771232 is a wasteful number, since it uses less digits than its factorization.

55771232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 340 (or 332 counting only the distinct ones).

The product of its digits is 14700, while the sum is 32.

The square root of 55771232 is about 7468.0139260716. The cubic root of 55771232 is about 382.0645523796.

Adding to 55771232 its reverse (23217755), we get a palindrome (78988987).

The spelling of 55771232 in words is "fifty-five million, seven hundred seventy-one thousand, two hundred thirty-two".