55008631 has 4 divisors (see below), whose sum is σ = 55338192. Its totient is φ = 54679072.

The previous prime is 55008623. The next prime is 55008671. The reversal of 55008631 is 13680055.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 55008631 - 2³ = 55008623 is a prime.

It is a super-2 number, since 2×55008631² = 6051898968988322, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 55008631.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55008671) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 164530 + ... + 164863.

It is an arithmetic number, because the mean of its divisors is an integer number (13834548).

Almost surely, 2^55008631 is an apocalyptic number.

55008631 is a deficient number, since it is larger than the sum of its proper divisors (329561).

55008631 is a wasteful number, since it uses less digits than its factorization.

55008631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 329560.

The product of its (nonzero) digits is 3600, while the sum is 28.

The square root of 55008631 is about 7416.7803661697. The cubic root of 55008631 is about 380.3151379342.

Adding to 55008631 its reverse (13680055), we get a palindrome (68688686).

The spelling of 55008631 in words is "fifty-five million, eight thousand, six hundred thirty-one".