90031301251 has 2 divisors, whose sum is σ = 90031301252. Its totient is φ = 90031301250.

The previous prime is 90031301221. The next prime is 90031301257. The reversal of 90031301251 is 15210313009.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 90031301251 - 2⁵ = 90031301219 is a prime.

It is not a weakly prime, because it can be changed into another prime (90031301257) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45015650625 + 45015650626.

It is an arithmetic number, because the mean of its divisors is an integer number (45015650626).

Almost surely, 2^90031301251 is an apocalyptic number.

90031301251 is a deficient number, since it is larger than the sum of its proper divisors (1).

90031301251 is an equidigital number, since it uses as much as digits as its factorization.

90031301251 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 810, while the sum is 25.

The spelling of 90031301251 in words is "ninety billion, thirty-one million, three hundred one thousand, two hundred fifty-one".