10515989 has 12 divisors (see below), whose sum is σ = 11639628. Its totient is φ = 9493440.

The previous prime is 10515977. The next prime is 10516003. The reversal of 10515989 is 98951501.

It can be written as a sum of positive squares in 2 ways, for example, as 3833764 + 6682225 = 1958^2 + 2585^2 .

It is a de Polignac number, because none of the positive numbers 2^k-10515989 is a prime.

It is a super-2 number, since 2×10515989² = 221172049296242, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10515929) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 28007 + ... + 28379.

It is an arithmetic number, because the mean of its divisors is an integer number (969969).

Almost surely, 2^10515989 is an apocalyptic number.

It is an amenable number.

10515989 is a deficient number, since it is larger than the sum of its proper divisors (1123639).

10515989 is a wasteful number, since it uses less digits than its factorization.

10515989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 628 (or 617 counting only the distinct ones).

The product of its (nonzero) digits is 16200, while the sum is 38.

The square root of 10515989 is about 3242.8365669580. The cubic root of 10515989 is about 219.0870500392.

The spelling of 10515989 in words is "ten million, five hundred fifteen thousand, nine hundred eighty-nine".