90506331 has 12 divisors (see below), whose sum is σ = 131397552. Its totient is φ = 60030096.

The previous prime is 90506309. The next prime is 90506341. The reversal of 90506331 is 13360509.

It is not a de Polignac number, because 90506331 - 2¹⁰ = 90505307 is a prime.

It is a super-2 number, since 2×90506331² = 16382791902163122, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 90506295 and 90506304.

It is not an unprimeable number, because it can be changed into a prime (90506341) 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, 23751 + ... + 27296.

It is an arithmetic number, because the mean of its divisors is an integer number (10949796).

Almost surely, 2^90506331 is an apocalyptic number.

90506331 is a deficient number, since it is larger than the sum of its proper divisors (40891221).

90506331 is a wasteful number, since it uses less digits than its factorization.

90506331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51250 (or 51247 counting only the distinct ones).

The product of its (nonzero) digits is 2430, while the sum is 27.

The square root of 90506331 is about 9513.4815393735. The cubic root of 90506331 is about 448.9793013972.

The spelling of 90506331 in words is "ninety million, five hundred six thousand, three hundred thirty-one".