22653481 has 4 divisors (see below), whose sum is σ = 22666500. Its totient is φ = 22640464.

The previous prime is 22653479. The next prime is 22653497. The reversal of 22653481 is 18435622.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 18435622 = 2 ⋅9217811.

It can be written as a sum of positive squares in 2 ways, for example, as 2223081 + 20430400 = 1491^2 + 4520^2 .

It is a cyclic number.

It is not a de Polignac number, because 22653481 - 2¹ = 22653479 is a prime.

It is a super-2 number, since 2×22653481² = 1026360402834722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22653451) 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, 3406 + ... + 7543.

It is an arithmetic number, because the mean of its divisors is an integer number (5666625).

Almost surely, 2^22653481 is an apocalyptic number.

It is an amenable number.

22653481 is a deficient number, since it is larger than the sum of its proper divisors (13019).

22653481 is a wasteful number, since it uses less digits than its factorization.

22653481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13018.

The product of its digits is 11520, while the sum is 31.

The square root of 22653481 is about 4759.5673122669. The cubic root of 22653481 is about 282.9512708118.

The spelling of 22653481 in words is "twenty-two million, six hundred fifty-three thousand, four hundred eighty-one".