90242225 has 12 divisors (see below), whose sum is σ = 116766336. Its totient is φ = 69054480.

The previous prime is 90242221. The next prime is 90242227. The reversal of 90242225 is 52224209.

It is not a de Polignac number, because 90242225 - 2² = 90242221 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 90242194 and 90242203.

It is not an unprimeable number, because it can be changed into a prime (90242221) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 77897 + ... + 79046.

It is an arithmetic number, because the mean of its divisors is an integer number (9730528).

Almost surely, 2^90242225 is an apocalyptic number.

It is an amenable number.

90242225 is a deficient number, since it is larger than the sum of its proper divisors (26524111).

90242225 is a wasteful number, since it uses less digits than its factorization.

90242225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 156976 (or 156971 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 26.

The square root of 90242225 is about 9499.5907806600. The cubic root of 90242225 is about 448.5421546100.

The spelling of 90242225 in words is "ninety million, two hundred forty-two thousand, two hundred twenty-five".