22950581 has 4 divisors (see below), whose sum is σ = 22985964. Its totient is φ = 22915200.

The previous prime is 22950559. The next prime is 22950583. The reversal of 22950581 is 18505922.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 18505922 = 2 ⋅9252961.

It can be written as a sum of positive squares in 2 ways, for example, as 15928081 + 7022500 = 3991^2 + 2650^2 .

It is a cyclic number.

It is not a de Polignac number, because 22950581 - 2⁶ = 22950517 is a prime.

It is a super-2 number, since 2×22950581² = 1053458336475122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22950583) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16700 + ... + 18021.

It is an arithmetic number, because the mean of its divisors is an integer number (5746491).

Almost surely, 2^22950581 is an apocalyptic number.

It is an amenable number.

22950581 is a deficient number, since it is larger than the sum of its proper divisors (35383).

22950581 is an equidigital number, since it uses as much as digits as its factorization.

22950581 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35382.

The product of its (nonzero) digits is 7200, while the sum is 32.

The square root of 22950581 is about 4790.6764658031. The cubic root of 22950581 is about 284.1828692307.

The spelling of 22950581 in words is "twenty-two million, nine hundred fifty thousand, five hundred eighty-one".