22138502 has 4 divisors (see below), whose sum is σ = 33207756. Its totient is φ = 11069250.

The previous prime is 22138481. The next prime is 22138517. The reversal of 22138502 is 20583122.

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

It is a super-2 number, since 2×22138502² = 980226541608008, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5534624 + ... + 5534627.

It is an arithmetic number, because the mean of its divisors is an integer number (8301939).

Almost surely, 2^22138502 is an apocalyptic number.

22138502 is a deficient number, since it is larger than the sum of its proper divisors (11069254).

22138502 is a wasteful number, since it uses less digits than its factorization.

22138502 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11069253.

The product of its (nonzero) digits is 960, while the sum is 23.

The square root of 22138502 is about 4705.1569580621. The cubic root of 22138502 is about 280.7907156098.

The spelling of 22138502 in words is "twenty-two million, one hundred thirty-eight thousand, five hundred two".