55130031 has 64 divisors (see below), whose sum is σ = 96422400. Its totient is φ = 30758400.

The previous prime is 55130003. The next prime is 55130051. The reversal of 55130031 is 13003155.

It is a happy number.

It is not a de Polignac number, because 55130031 - 2⁶ = 55129967 is a prime.

It is a super-2 number, since 2×55130031² = 6078640636121922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 55129986 and 55130013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55130051) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 307900 + ... + 308078.

It is an arithmetic number, because the mean of its divisors is an integer number (1506600).

Almost surely, 2^55130031 is an apocalyptic number.

55130031 is a gapful number since it is divisible by the number (51) formed by its first and last digit.

55130031 is a deficient number, since it is larger than the sum of its proper divisors (41292369).

55130031 is a wasteful number, since it uses less digits than its factorization.

55130031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 277 (or 271 counting only the distinct ones).

The product of its (nonzero) digits is 225, while the sum is 18.

The square root of 55130031 is about 7424.9599998923. The cubic root of 55130031 is about 380.5947082108.

Adding to 55130031 its reverse (13003155), we get a palindrome (68133186).

The spelling of 55130031 in words is "fifty-five million, one hundred thirty thousand, thirty-one".