55490131 has 2 divisors, whose sum is σ = 55490132. Its totient is φ = 55490130.

The previous prime is 55490101. The next prime is 55490173. The reversal of 55490131 is 13109455.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 55490131 - 2⁹ = 55489619 is a prime.

It is a super-2 number, since 2×55490131² = 6158309276794322, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 55490131.

It is not a weakly prime, because it can be changed into another prime (55490101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27745065 + 27745066.

It is an arithmetic number, because the mean of its divisors is an integer number (27745066).

Almost surely, 2^55490131 is an apocalyptic number.

55490131 is a deficient number, since it is larger than the sum of its proper divisors (1).

55490131 is an equidigital number, since it uses as much as digits as its factorization.

55490131 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2700, while the sum is 28.

The square root of 55490131 is about 7449.1698195168. The cubic root of 55490131 is about 381.4215705072.

Adding to 55490131 its reverse (13109455), we get a palindrome (68599586).

The spelling of 55490131 in words is "fifty-five million, four hundred ninety thousand, one hundred thirty-one".