22540139 has 4 divisors (see below), whose sum is σ = 22553424. Its totient is φ = 22526856.

The previous prime is 22540121. The next prime is 22540153. The reversal of 22540139 is 93104522.

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 22540139 - 2¹² = 22536043 is a prime.

It is a super-2 number, since 2×22540139² = 1016115732278642, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22540169) 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, 3647 + ... + 7640.

It is an arithmetic number, because the mean of its divisors is an integer number (5638356).

Almost surely, 2^22540139 is an apocalyptic number.

22540139 is a deficient number, since it is larger than the sum of its proper divisors (13285).

22540139 is a wasteful number, since it uses less digits than its factorization.

22540139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13284.

The product of its (nonzero) digits is 2160, while the sum is 26.

The square root of 22540139 is about 4747.6456270451. The cubic root of 22540139 is about 282.4785855801.

The spelling of 22540139 in words is "twenty-two million, five hundred forty thousand, one hundred thirty-nine".