55747531 has 16 divisors (see below), whose sum is σ = 64915200. Its totient is φ = 46889568.

The previous prime is 55747529. The next prime is 55747537. The reversal of 55747531 is 13574755.

It is a cyclic number.

It is not a de Polignac number, because 55747531 - 2¹ = 55747529 is a prime.

It is a super-2 number, since 2×55747531² = 6215574425191922, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (55747537) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 132840 + ... + 133258.

It is an arithmetic number, because the mean of its divisors is an integer number (4057200).

Almost surely, 2^55747531 is an apocalyptic number.

55747531 is a deficient number, since it is larger than the sum of its proper divisors (9167669).

55747531 is a wasteful number, since it uses less digits than its factorization.

55747531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 738.

The product of its digits is 73500, while the sum is 37.

The square root of 55747531 is about 7466.4269232344. The cubic root of 55747531 is about 382.0104229496.

The spelling of 55747531 in words is "fifty-five million, seven hundred forty-seven thousand, five hundred thirty-one".