15051225 has 24 divisors (see below), whose sum is σ = 28440640. Its totient is φ = 6880320.

The previous prime is 15051217. The next prime is 15051229. The reversal of 15051225 is 52215051.

It is not a de Polignac number, because 15051225 - 2³ = 15051217 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is not an unprimeable number, because it can be changed into a prime (15051229) 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, 13810 + ... + 14859.

Almost surely, 2^15051225 is an apocalyptic number.

15051225 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

15051225 is a deficient number, since it is larger than the sum of its proper divisors (13389415).

15051225 is a wasteful number, since it uses less digits than its factorization.

15051225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28689 (or 28684 counting only the distinct ones).

The product of its (nonzero) digits is 500, while the sum is 21.

The square root of 15051225 is about 3879.5908289406. The cubic root of 15051225 is about 246.9016256067.

Adding to 15051225 its reverse (52215051), we get a palindrome (67266276).

The spelling of 15051225 in words is "fifteen million, fifty-one thousand, two hundred twenty-five".