15622139 has 4 divisors (see below), whose sum is σ = 16823856. Its totient is φ = 14420424.

The previous prime is 15622127. The next prime is 15622153. The reversal of 15622139 is 93122651.

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 15622139 - 2²⁰ = 14573563 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (15622169) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 600839 + ... + 600864.

It is an arithmetic number, because the mean of its divisors is an integer number (4205964).

Almost surely, 2^15622139 is an apocalyptic number.

15622139 is a deficient number, since it is larger than the sum of its proper divisors (1201717).

15622139 is a wasteful number, since it uses less digits than its factorization.

15622139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1201716.

The product of its digits is 3240, while the sum is 29.

The square root of 15622139 is about 3952.4851675876. The cubic root of 15622139 is about 249.9847404019.

The spelling of 15622139 in words is "fifteen million, six hundred twenty-two thousand, one hundred thirty-nine".