55504031 has 20 divisors (see below), whose sum is σ = 64935360. Its totient is φ = 47277120.

The previous prime is 55504019. The next prime is 55504051. The reversal of 55504031 is 13040555.

It is not a de Polignac number, because 55504031 - 2⁶ = 55503967 is a prime.

It is a super-2 number, since 2×55504031² = 6161394914497922, which contains 22 as substring.

It is a Smith number, since the sum of its digits (23) coincides with the sum of the digits of its prime factors.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 55503988 and 55504006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55504051) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 248786 + ... + 249008.

It is an arithmetic number, because the mean of its divisors is an integer number (3246768).

Almost surely, 2^55504031 is an apocalyptic number.

55504031 is a deficient number, since it is larger than the sum of its proper divisors (9431329).

55504031 is an equidigital number, since it uses as much as digits as its factorization.

55504031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 284 (or 251 counting only the distinct ones).

The product of its (nonzero) digits is 1500, while the sum is 23.

The square root of 55504031 is about 7450.1027509693. The cubic root of 55504031 is about 381.4534159129.

Adding to 55504031 its reverse (13040555), we get a palindrome (68544586).

The spelling of 55504031 in words is "fifty-five million, five hundred four thousand, thirty-one".