90251212 has 12 divisors (see below), whose sum is σ = 159843096. Its totient is φ = 44581760.

The previous prime is 90251207. The next prime is 90251221. The reversal of 90251212 is 21215209.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 135589 + ... + 136252.

It is an arithmetic number, because the mean of its divisors is an integer number (13320258).

Almost surely, 2^90251212 is an apocalyptic number.

It is an amenable number.

90251212 is a deficient number, since it is larger than the sum of its proper divisors (69591884).

90251212 is a wasteful number, since it uses less digits than its factorization.

90251212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 271928 (or 271926 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 22.

The square root of 90251212 is about 9500.0637892595. The cubic root of 90251212 is about 448.5570438504.

The spelling of 90251212 in words is "ninety million, two hundred fifty-one thousand, two hundred twelve".