90228223 has 2 divisors, whose sum is σ = 90228224. Its totient is φ = 90228222.

The previous prime is 90228157. The next prime is 90228227. The reversal of 90228223 is 32282209.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-90228223 is a prime.

It is a super-2 number, since 2×90228223² = 16282264451475458, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 90228191 and 90228200.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (90228227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45114111 + 45114112.

It is an arithmetic number, because the mean of its divisors is an integer number (45114112).

Almost surely, 2^90228223 is an apocalyptic number.

90228223 is a deficient number, since it is larger than the sum of its proper divisors (1).

90228223 is an equidigital number, since it uses as much as digits as its factorization.

90228223 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3456, while the sum is 28.

The square root of 90228223 is about 9498.8537729560. The cubic root of 90228223 is about 448.5189547827.

The spelling of 90228223 in words is "ninety million, two hundred twenty-eight thousand, two hundred twenty-three".