90218252 has 12 divisors (see below), whose sum is σ = 167169240. Its totient is φ = 42455616.

The previous prime is 90218231. The next prime is 90218273. The reversal of 90218252 is 25281209.

It is an interprime number because it is at equal distance from previous prime (90218231) and next prime (90218273).

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, 663302 + ... + 663437.

It is an arithmetic number, because the mean of its divisors is an integer number (13930770).

Almost surely, 2^90218252 is an apocalyptic number.

It is an amenable number.

90218252 is a deficient number, since it is larger than the sum of its proper divisors (76950988).

90218252 is a wasteful number, since it uses less digits than its factorization.

90218252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1326760 (or 1326758 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 29.

The square root of 90218252 is about 9498.3289056549. The cubic root of 90218252 is about 448.5024324312.

The spelling of 90218252 in words is "ninety million, two hundred eighteen thousand, two hundred fifty-two".