10531215 has 20 divisors (see below), whose sum is σ = 18878904. Its totient is φ = 5616432.

The previous prime is 10531201. The next prime is 10531229. The reversal of 10531215 is 51213501.

It is an interprime number because it is at equal distance from previous prime (10531201) and next prime (10531229).

It is not a de Polignac number, because 10531215 - 2⁶ = 10531151 is a prime.

It is a super-2 number, since 2×10531215² = 221812978752450, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 12597 + ... + 13406.

Almost surely, 2^10531215 is an apocalyptic number.

10531215 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

10531215 is a deficient number, since it is larger than the sum of its proper divisors (8347689).

10531215 is an equidigital number, since it uses as much as digits as its factorization.

10531215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26020 (or 26011 counting only the distinct ones).

The product of its (nonzero) digits is 150, while the sum is 18.

The square root of 10531215 is about 3245.1833538338. The cubic root of 10531215 is about 219.1927370633.

Adding to 10531215 its reverse (51213501), we get a palindrome (61744716).

The spelling of 10531215 in words is "ten million, five hundred thirty-one thousand, two hundred fifteen".