22394531 has 4 divisors (see below), whose sum is σ = 22410864. Its totient is φ = 22378200.

The previous prime is 22394507. The next prime is 22394543. The reversal of 22394531 is 13549322.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 22394531 - 2¹⁸ = 22132387 is a prime.

It is a super-2 number, since 2×22394531² = 1003030037419922, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 22394494 and 22394503.

It is not an unprimeable number, because it can be changed into a prime (22394501) 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, 5900 + ... + 8921.

It is an arithmetic number, because the mean of its divisors is an integer number (5602716).

Almost surely, 2^22394531 is an apocalyptic number.

22394531 is a deficient number, since it is larger than the sum of its proper divisors (16333).

22394531 is a wasteful number, since it uses less digits than its factorization.

22394531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16332.

The product of its digits is 6480, while the sum is 29.

The square root of 22394531 is about 4732.2860226322. The cubic root of 22394531 is about 281.8690059410.

The spelling of 22394531 in words is "twenty-two million, three hundred ninety-four thousand, five hundred thirty-one".