22538534 has 4 divisors (see below), whose sum is σ = 33807804. Its totient is φ = 11269266.

The previous prime is 22538533. The next prime is 22538543. The reversal of 22538534 is 43583522.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 43583522 = 2 ⋅21791761.

It is a self number, because there is not a number n which added to its sum of digits gives 22538534.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22538533) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5634632 + ... + 5634635.

It is an arithmetic number, because the mean of its divisors is an integer number (8451951).

Almost surely, 2^22538534 is an apocalyptic number.

22538534 is a deficient number, since it is larger than the sum of its proper divisors (11269270).

22538534 is a wasteful number, since it uses less digits than its factorization.

22538534 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11269269.

The product of its digits is 28800, while the sum is 32.

The square root of 22538534 is about 4747.4765928860. The cubic root of 22538534 is about 282.4718806689.

The spelling of 22538534 in words is "twenty-two million, five hundred thirty-eight thousand, five hundred thirty-four".