15225993 has 24 divisors (see below), whose sum is σ = 22565088. Its totient is φ = 9891072.

The previous prime is 15225989. The next prime is 15226007. The reversal of 15225993 is 39952251.

It is a happy number.

It is not a de Polignac number, because 15225993 - 2² = 15225989 is a prime.

It is not an unprimeable number, because it can be changed into a prime (15225943) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 93330 + ... + 93492.

It is an arithmetic number, because the mean of its divisors is an integer number (940212).

Almost surely, 2^15225993 is an apocalyptic number.

It is an amenable number.

15225993 is a deficient number, since it is larger than the sum of its proper divisors (7339095).

15225993 is a wasteful number, since it uses less digits than its factorization.

15225993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 373 (or 370 counting only the distinct ones).

The product of its digits is 24300, while the sum is 36.

The square root of 15225993 is about 3902.0498459143. The cubic root of 15225993 is about 247.8535870523.

The spelling of 15225993 in words is "fifteen million, two hundred twenty-five thousand, nine hundred ninety-three".