90562231 has 2 divisors, whose sum is σ = 90562232. Its totient is φ = 90562230.

The previous prime is 90562229. The next prime is 90562243. The reversal of 90562231 is 13226509.

It is a weak prime.

It is an emirp because it is prime and its reverse (13226509) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 90562231 - 2¹ = 90562229 is a prime.

It is a super-2 number, since 2×90562231² = 16403035367394722, which contains 22 as substring.

Together with 90562229, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 90562231.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (90562261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45281115 + 45281116.

It is an arithmetic number, because the mean of its divisors is an integer number (45281116).

Almost surely, 2^90562231 is an apocalyptic number.

90562231 is a deficient number, since it is larger than the sum of its proper divisors (1).

90562231 is an equidigital number, since it uses as much as digits as its factorization.

90562231 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3240, while the sum is 28.

The square root of 90562231 is about 9516.4190218800. The cubic root of 90562231 is about 449.0717176857.

It can be divided in two parts, 905 and 62231, that added together give a palindrome (63136).

The spelling of 90562231 in words is "ninety million, five hundred sixty-two thousand, two hundred thirty-one".