22522981 has 8 divisors (see below), whose sum is σ = 24847704. Its totient is φ = 20282880.

The previous prime is 22522939. The next prime is 22522987. The reversal of 22522981 is 18922522.

It can be written as a sum of positive squares in 4 ways, for example, as 112225 + 22410756 = 335^2 + 4734^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 22522981 - 2⁷ = 22522853 is a prime.

It is a super-2 number, since 2×22522981² = 1014569346252722, 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 (22522987) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20596 + ... + 21661.

It is an arithmetic number, because the mean of its divisors is an integer number (3105963).

Almost surely, 2^22522981 is an apocalyptic number.

It is an amenable number.

22522981 is a deficient number, since it is larger than the sum of its proper divisors (2324723).

22522981 is a wasteful number, since it uses less digits than its factorization.

22522981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42311.

The product of its digits is 5760, while the sum is 31.

The square root of 22522981 is about 4745.8382821162. The cubic root of 22522981 is about 282.4068912883.

The spelling of 22522981 in words is "twenty-two million, five hundred twenty-two thousand, nine hundred eighty-one".