15622239 has 4 divisors (see below), whose sum is σ = 20829656. Its totient is φ = 10414824.

The previous prime is 15622231. The next prime is 15622241. The reversal of 15622239 is 93222651.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 93222651 = 3 ⋅31074217.

It is not a de Polignac number, because 15622239 - 2³ = 15622231 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15622231) 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, 2603704 + ... + 2603709.

It is an arithmetic number, because the mean of its divisors is an integer number (5207414).

Almost surely, 2^15622239 is an apocalyptic number.

15622239 is a deficient number, since it is larger than the sum of its proper divisors (5207417).

15622239 is an equidigital number, since it uses as much as digits as its factorization.

15622239 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5207416.

The product of its digits is 6480, while the sum is 30.

The square root of 15622239 is about 3952.4978178362. The cubic root of 15622239 is about 249.9852737992.

The spelling of 15622239 in words is "fifteen million, six hundred twenty-two thousand, two hundred thirty-nine".