55583831 has 2 divisors, whose sum is σ = 55583832. Its totient is φ = 55583830.

The previous prime is 55583791. The next prime is 55583839. The reversal of 55583831 is 13838555.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 55583831 - 2¹⁸ = 55321687 is a prime.

It is a super-2 number, since 2×55583831² = 6179124537273122, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55583839) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27791915 + 27791916.

It is an arithmetic number, because the mean of its divisors is an integer number (27791916).

Almost surely, 2^55583831 is an apocalyptic number.

55583831 is a deficient number, since it is larger than the sum of its proper divisors (1).

55583831 is an equidigital number, since it uses as much as digits as its factorization.

55583831 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 72000, while the sum is 38.

The square root of 55583831 is about 7455.4564581922. The cubic root of 55583831 is about 381.6361378131.

The spelling of 55583831 in words is "fifty-five million, five hundred eighty-three thousand, eight hundred thirty-one".