90474251 has 16 divisors (see below), whose sum is σ = 104966400. Its totient is φ = 76383648.

The previous prime is 90474211. The next prime is 90474281. The reversal of 90474251 is 15247409.

It is a happy number.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-90474251 is a prime.

It is a super-2 number, since 2×90474251² = 16371180188022002, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (90474211) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 215720 + ... + 216138.

It is an arithmetic number, because the mean of its divisors is an integer number (6560400).

Almost surely, 2^90474251 is an apocalyptic number.

90474251 is a deficient number, since it is larger than the sum of its proper divisors (14492149).

90474251 is a wasteful number, since it uses less digits than its factorization.

90474251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 818.

The product of its (nonzero) digits is 10080, while the sum is 32.

The square root of 90474251 is about 9511.7953615498. The cubic root of 90474251 is about 448.9262481727.

The spelling of 90474251 in words is "ninety million, four hundred seventy-four thousand, two hundred fifty-one".