55528331 has 2 divisors, whose sum is σ = 55528332. Its totient is φ = 55528330.

The previous prime is 55528271. The next prime is 55528339. The reversal of 55528331 is 13382555.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 55528331 - 2⁶ = 55528267 is a prime.

It is a super-2 number, since 2×55528331² = 6166791087291122, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (55528339) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27764165 + 27764166.

It is an arithmetic number, because the mean of its divisors is an integer number (27764166).

Almost surely, 2^55528331 is an apocalyptic number.

55528331 is a deficient number, since it is larger than the sum of its proper divisors (1).

55528331 is an equidigital number, since it uses as much as digits as its factorization.

55528331 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 18000, while the sum is 32.

The square root of 55528331 is about 7451.7334224998. The cubic root of 55528331 is about 381.5090753275.

The spelling of 55528331 in words is "fifty-five million, five hundred twenty-eight thousand, three hundred thirty-one".