90272251 has 2 divisors, whose sum is σ = 90272252. Its totient is φ = 90272250.

The previous prime is 90272243. The next prime is 90272257. The reversal of 90272251 is 15227209.

It is a strong prime.

It is an emirp because it is prime and its reverse (15227209) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 90272251 - 2³ = 90272243 is a prime.

It is not a weakly prime, because it can be changed into another prime (90272257) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45136125 + 45136126.

It is an arithmetic number, because the mean of its divisors is an integer number (45136126).

Almost surely, 2^90272251 is an apocalyptic number.

90272251 is a deficient number, since it is larger than the sum of its proper divisors (1).

90272251 is an equidigital number, since it uses as much as digits as its factorization.

90272251 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2520, while the sum is 28.

The square root of 90272251 is about 9501.1710330885. The cubic root of 90272251 is about 448.5918964144.

It can be divided in two parts, 902 and 72251, that added together give a triangular number (73153 = T₃₈₂).

The spelling of 90272251 in words is "ninety million, two hundred seventy-two thousand, two hundred fifty-one".