22512481 has 4 divisors (see below), whose sum is σ = 22684464. Its totient is φ = 22340500.

The previous prime is 22512443. The next prime is 22512487. The reversal of 22512481 is 18421522.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 22512481 - 2⁷ = 22512353 is a prime.

It is a super-2 number, since 2×22512481² = 1013623601550722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22512487) 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, 85795 + ... + 86056.

It is an arithmetic number, because the mean of its divisors is an integer number (5671116).

Almost surely, 2^22512481 is an apocalyptic number.

It is an amenable number.

22512481 is a deficient number, since it is larger than the sum of its proper divisors (171983).

22512481 is a wasteful number, since it uses less digits than its factorization.

22512481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 171982.

The product of its digits is 1280, while the sum is 25.

The square root of 22512481 is about 4744.7319207728. The cubic root of 22512481 is about 282.3629993294.

The spelling of 22512481 in words is "twenty-two million, five hundred twelve thousand, four hundred eighty-one".