55512631 has 4 divisors (see below), whose sum is σ = 56273152. Its totient is φ = 54752112.

The previous prime is 55512607. The next prime is 55512673. The reversal of 55512631 is 13621555.

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 55512631 - 2¹¹ = 55510583 is a prime.

It is a super-2 number, since 2×55512631² = 6163304401084322, 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 55512631.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55512601) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 380151 + ... + 380296.

It is an arithmetic number, because the mean of its divisors is an integer number (14068288).

Almost surely, 2^55512631 is an apocalyptic number.

55512631 is a deficient number, since it is larger than the sum of its proper divisors (760521).

55512631 is an equidigital number, since it uses as much as digits as its factorization.

55512631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 760520.

The product of its digits is 4500, while the sum is 28.

The square root of 55512631 is about 7450.6799018613. The cubic root of 55512631 is about 381.4731161635.

The spelling of 55512631 in words is "fifty-five million, five hundred twelve thousand, six hundred thirty-one".