55238031 has 24 divisors (see below), whose sum is σ = 84324240. Its totient is φ = 36122112.

The previous prime is 55238023. The next prime is 55238059. The reversal of 55238031 is 13083255.

55238031 is a `hidden beast` number, since 552 + 3 + 80 + 31 = 666.

It is not a de Polignac number, because 55238031 - 2³ = 55238023 is a prime.

It is a super-2 number, since 2×55238031² = 6102480137513922, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 55237986 and 55238004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55238231) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 10735 + ... + 15023.

It is an arithmetic number, because the mean of its divisors is an integer number (3513510).

Almost surely, 2^55238031 is an apocalyptic number.

55238031 is a deficient number, since it is larger than the sum of its proper divisors (29086209).

55238031 is an equidigital number, since it uses as much as digits as its factorization.

55238031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4357 (or 4345 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 27.

The square root of 55238031 is about 7432.2292079833. The cubic root of 55238031 is about 380.8430750615.

It can be divided in two parts, 552 and 38031, that added together give a palindrome (38583).

The spelling of 55238031 in words is "fifty-five million, two hundred thirty-eight thousand, thirty-one".