15622224 has 20 divisors (see below), whose sum is σ = 40357536. Its totient is φ = 5207392.

The previous prime is 15622223. The next prime is 15622231. The reversal of 15622224 is 42222651.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a junction number, because it is equal to n+sod(n) for n = 15622194 and 15622203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15622223) 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, 162684 + ... + 162779.

Almost surely, 2^15622224 is an apocalyptic number.

It is an amenable number.

15622224 is an abundant number, since it is smaller than the sum of its proper divisors (24735312).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

15622224 is a wasteful number, since it uses less digits than its factorization.

15622224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 325474 (or 325468 counting only the distinct ones).

The product of its digits is 1920, while the sum is 24.

The square root of 15622224 is about 3952.4959203015. The cubic root of 15622224 is about 249.9851937898.

Adding to 15622224 its reverse (42222651), we get a palindrome (57844875).

It can be divided in two parts, 15 and 622224, that multiplied together give a triangular number (9333360 = T₄₃₂₀).

The spelling of 15622224 in words is "fifteen million, six hundred twenty-two thousand, two hundred twenty-four".