10515225 has 24 divisors (see below), whose sum is σ = 19869760. Its totient is φ = 4806720.

The previous prime is 10515217. The next prime is 10515233. The reversal of 10515225 is 52251501.

It is an interprime number because it is at equal distance from previous prime (10515217) and next prime (10515233).

It is not a de Polignac number, because 10515225 - 2³ = 10515217 is a prime.

It is a super-2 number, since 2×10515225² = 221139913601250, which contains 22 as substring.

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

It is a nialpdrome in base 15.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9490 + ... + 10539.

Almost surely, 2^10515225 is an apocalyptic number.

10515225 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

10515225 is a deficient number, since it is larger than the sum of its proper divisors (9354535).

10515225 is a wasteful number, since it uses less digits than its factorization.

10515225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20049 (or 20044 counting only the distinct ones).

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

The square root of 10515225 is about 3242.7187667141. The cubic root of 10515225 is about 219.0817442596.

Adding to 10515225 its reverse (52251501), we get a palindrome (62766726).

The spelling of 10515225 in words is "ten million, five hundred fifteen thousand, two hundred twenty-five".