28512302531 has 2 divisors, whose sum is σ = 28512302532. Its totient is φ = 28512302530.

The previous prime is 28512302503. The next prime is 28512302549. The reversal of 28512302531 is 13520321582.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 28512302531 - 2²² = 28508108227 is a prime.

It is a super-2 number, since 2×28512302531² (a number of 22 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (28512302431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14256151265 + 14256151266.

It is an arithmetic number, because the mean of its divisors is an integer number (14256151266).

Almost surely, 2^28512302531 is an apocalyptic number.

28512302531 is a deficient number, since it is larger than the sum of its proper divisors (1).

28512302531 is an equidigital number, since it uses as much as digits as its factorization.

28512302531 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 14400, while the sum is 32.

The spelling of 28512302531 in words is "twenty-eight billion, five hundred twelve million, three hundred two thousand, five hundred thirty-one".