90131022233 has 6 divisors (see below), whose sum is σ = 104846291226. Its totient is φ = 77255161872.

The previous prime is 90131022217. The next prime is 90131022251. The reversal of 90131022233 is 33222013109.

It can be written as a sum of positive squares in only one way, i.e., 63913907344 + 26217114889 = 252812^2 + 161917^2 .

It is not a de Polignac number, because 90131022233 - 2⁴ = 90131022217 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (90131022203) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 919704260 + ... + 919704357.

It is an arithmetic number, because the mean of its divisors is an integer number (17474381871).

Almost surely, 2^90131022233 is an apocalyptic number.

It is an amenable number.

90131022233 is a deficient number, since it is larger than the sum of its proper divisors (14715268993).

90131022233 is a wasteful number, since it uses less digits than its factorization.

90131022233 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1839408631 (or 1839408624 counting only the distinct ones).

The product of its (nonzero) digits is 1944, while the sum is 26.

The spelling of 90131022233 in words is "ninety billion, one hundred thirty-one million, twenty-two thousand, two hundred thirty-three".