90250051 has 2 divisors, whose sum is σ = 90250052. Its totient is φ = 90250050.

The previous prime is 90250031. The next prime is 90250063. The reversal of 90250051 is 15005209.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 90250051 - 2²¹ = 88152899 is a prime.

It is not a weakly prime, because it can be changed into another prime (90250031) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45125025 + 45125026.

It is an arithmetic number, because the mean of its divisors is an integer number (45125026).

Almost surely, 2^90250051 is an apocalyptic number.

90250051 is a deficient number, since it is larger than the sum of its proper divisors (1).

90250051 is an equidigital number, since it uses as much as digits as its factorization.

90250051 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 450, while the sum is 22.

The square root of 90250051 is about 9500.0026842101. The cubic root of 90250051 is about 448.5551204156. Note that the first 3 decimals are identical.

The spelling of 90250051 in words is "ninety million, two hundred fifty thousand, fifty-one".