90222261 has 16 divisors (see below), whose sum is σ = 126074880. Its totient is φ = 57281840.

The previous prime is 90222239. The next prime is 90222283. The reversal of 90222261 is 16222209.

It is an interprime number because it is at equal distance from previous prime (90222239) and next prime (90222283).

It is a cyclic number.

It is not a de Polignac number, because 90222261 - 2⁵ = 90222229 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90222061) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13756 + ... + 19226.

It is an arithmetic number, because the mean of its divisors is an integer number (7879680).

Almost surely, 2^90222261 is an apocalyptic number.

It is an amenable number.

90222261 is a deficient number, since it is larger than the sum of its proper divisors (35852619).

90222261 is a wasteful number, since it uses less digits than its factorization.

90222261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5736.

The product of its (nonzero) digits is 864, while the sum is 24.

The square root of 90222261 is about 9498.5399404330. The cubic root of 90222261 is about 448.5090756532.

The spelling of 90222261 in words is "ninety million, two hundred twenty-two thousand, two hundred sixty-one".