15138225 has 48 divisors (see below), whose sum is σ = 28539840. Its totient is φ = 7862400.

The previous prime is 15138197. The next prime is 15138239. The reversal of 15138225 is 52283151.

It is a happy number.

It is not a de Polignac number, because 15138225 - 2¹⁰ = 15137201 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 27402 + ... + 27948.

It is an arithmetic number, because the mean of its divisors is an integer number (594580).

Almost surely, 2^15138225 is an apocalyptic number.

15138225 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

15138225 is a deficient number, since it is larger than the sum of its proper divisors (13401615).

15138225 is a wasteful number, since it uses less digits than its factorization.

15138225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 607 (or 596 counting only the distinct ones).

The product of its digits is 2400, while the sum is 27.

The square root of 15138225 is about 3890.7871954143. The cubic root of 15138225 is about 247.3764305103.

The spelling of 15138225 in words is "fifteen million, one hundred thirty-eight thousand, two hundred twenty-five".