15225994 has 16 divisors (see below), whose sum is σ = 26224128. Its totient is φ = 6494832.

The previous prime is 15225989. The next prime is 15226007. The reversal of 15225994 is 49952251.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 684 + ... + 5560.

It is an arithmetic number, because the mean of its divisors is an integer number (1639008).

Almost surely, 2^15225994 is an apocalyptic number.

15225994 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

15225994 is a deficient number, since it is larger than the sum of its proper divisors (10998134).

15225994 is a wasteful number, since it uses less digits than its factorization.

15225994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5109.

The product of its digits is 32400, while the sum is 37.

The square root of 15225994 is about 3902.0499740521. The cubic root of 15225994 is about 247.8535924784.

The spelling of 15225994 in words is "fifteen million, two hundred twenty-five thousand, nine hundred ninety-four".