55087931 has 8 divisors (see below), whose sum is σ = 56787504. Its totient is φ = 53399520.

The previous prime is 55087927. The next prime is 55088009. The reversal of 55087931 is 13978055.

55087931 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 55087931 - 2² = 55087927 is a prime.

It is a super-2 number, since 2×55087931² = 6069360283721522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55087831) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7841 + ... + 13101.

It is an arithmetic number, because the mean of its divisors is an integer number (7098438).

Almost surely, 2^55087931 is an apocalyptic number.

55087931 is a deficient number, since it is larger than the sum of its proper divisors (1699573).

55087931 is a wasteful number, since it uses less digits than its factorization.

55087931 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5581.

The product of its (nonzero) digits is 37800, while the sum is 38.

The square root of 55087931 is about 7422.1244263351. The cubic root of 55087931 is about 380.4978032673.

The spelling of 55087931 in words is "fifty-five million, eighty-seven thousand, nine hundred thirty-one".