55631787 has 8 divisors (see below), whose sum is σ = 74210304. Its totient is φ = 37070568.

The previous prime is 55631759. The next prime is 55631789. The reversal of 55631787 is 78713655.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 55631787 - 2⁷ = 55631659 is a prime.

It is not an unprimeable number, because it can be changed into a prime (55631789) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9478 + ... + 14180.

It is an arithmetic number, because the mean of its divisors is an integer number (9276288).

Almost surely, 2^55631787 is an apocalyptic number.

55631787 is a deficient number, since it is larger than the sum of its proper divisors (18578517).

55631787 is a wasteful number, since it uses less digits than its factorization.

55631787 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8649.

The product of its digits is 176400, while the sum is 42.

The square root of 55631787 is about 7458.6719327237. The cubic root of 55631787 is about 381.7458608592.

The spelling of 55631787 in words is "fifty-five million, six hundred thirty-one thousand, seven hundred eighty-seven".