55512931 has 4 divisors (see below), whose sum is σ = 57427200. Its totient is φ = 53598664.

The previous prime is 55512911. The next prime is 55512979. The reversal of 55512931 is 13921555.

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 55512931 - 2¹¹ = 55510883 is a prime.

It is a super-2 number, since 2×55512931² = 6163371016421522, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 55512893 and 55512902.

It is not an unprimeable number, because it can be changed into a prime (55512901) 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, 957091 + ... + 957148.

It is an arithmetic number, because the mean of its divisors is an integer number (14356800).

Almost surely, 2^55512931 is an apocalyptic number.

55512931 is a deficient number, since it is larger than the sum of its proper divisors (1914269).

55512931 is a wasteful number, since it uses less digits than its factorization.

55512931 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1914268.

The product of its digits is 6750, while the sum is 31.

The square root of 55512931 is about 7450.7000342250. The cubic root of 55512931 is about 381.4738033448.

The spelling of 55512931 in words is "fifty-five million, five hundred twelve thousand, nine hundred thirty-one".