28553532331 has 2 divisors, whose sum is σ = 28553532332. Its totient is φ = 28553532330.

The previous prime is 28553532323. The next prime is 28553532347. The reversal of 28553532331 is 13323535582.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 28553532331 - 2³ = 28553532323 is a prime.

It is a super-2 number, since 2×28553532331² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (28553532431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14276766165 + 14276766166.

It is an arithmetic number, because the mean of its divisors is an integer number (14276766166).

Almost surely, 2^28553532331 is an apocalyptic number.

28553532331 is a deficient number, since it is larger than the sum of its proper divisors (1).

28553532331 is an equidigital number, since it uses as much as digits as its factorization.

28553532331 is an evil number, because the sum of its binary digits is even.

The product of its digits is 324000, while the sum is 40.

The spelling of 28553532331 in words is "twenty-eight billion, five hundred fifty-three million, five hundred thirty-two thousand, three hundred thirty-one".