55772532 has 36 divisors (see below), whose sum is σ = 141240736. Its totient is φ = 18556560.

The previous prime is 55772501. The next prime is 55772533. The reversal of 55772532 is 23527755.

It is a happy number.

55772532 is a `hidden beast` number, since 5 + 57 + 72 + 532 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-2 number, since 2×55772532² = 6221150651382048, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55772533) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 25107 + ... + 27237.

Almost surely, 2^55772532 is an apocalyptic number.

It is an amenable number.

55772532 is an abundant number, since it is smaller than the sum of its proper divisors (85468204).

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

55772532 is a wasteful number, since it uses less digits than its factorization.

55772532 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2868 (or 2863 counting only the distinct ones).

The product of its digits is 73500, while the sum is 36.

The square root of 55772532 is about 7468.1009634311. The cubic root of 55772532 is about 382.0675209355.

The spelling of 55772532 in words is "fifty-five million, seven hundred seventy-two thousand, five hundred thirty-two".