55761631 has 2 divisors, whose sum is σ = 55761632. Its totient is φ = 55761630.

The previous prime is 55761623. The next prime is 55761661. The reversal of 55761631 is 13616755.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 55761631 - 2³ = 55761623 is a prime.

It is a super-2 number, since 2×55761631² = 6218718983560322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55761661) 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 as a sum of consecutive naturals, namely, 27880815 + 27880816.

It is an arithmetic number, because the mean of its divisors is an integer number (27880816).

Almost surely, 2^55761631 is an apocalyptic number.

55761631 is a deficient number, since it is larger than the sum of its proper divisors (1).

55761631 is an equidigital number, since it uses as much as digits as its factorization.

55761631 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 18900, while the sum is 34.

The square root of 55761631 is about 7467.3710902834. The cubic root of 55761631 is about 382.0426270240.

The spelling of 55761631 in words is "fifty-five million, seven hundred sixty-one thousand, six hundred thirty-one".