15273225 has 96 divisors (see below), whose sum is σ = 32676480. Its totient is φ = 6969600.

The previous prime is 15273221. The next prime is 15273229. The reversal of 15273225 is 52237251.

15273225 = 528² + 529² + ... + 577².

It is an interprime number because it is at equal distance from previous prime (15273221) and next prime (15273229).

It is not a de Polignac number, because 15273225 - 2² = 15273221 is a prime.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15273221) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 898417 + ... + 898433.

It is an arithmetic number, because the mean of its divisors is an integer number (340380).

Almost surely, 2^15273225 is an apocalyptic number.

15273225 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

15273225 is an abundant number, since it is smaller than the sum of its proper divisors (17403255).

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

15273225 is a wasteful number, since it uses less digits than its factorization.

15273225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69 (or 36 counting only the distinct ones).

The product of its digits is 4200, while the sum is 27.

The square root of 15273225 is about 3908.0973631679. The cubic root of 15273225 is about 248.1096083738.

The spelling of 15273225 in words is "fifteen million, two hundred seventy-three thousand, two hundred twenty-five".