10215999 has 6 divisors (see below), whose sum is σ = 14756456. Its totient is φ = 6810660.

The previous prime is 10215971. The next prime is 10216013. The reversal of 10215999 is 99951201.

10215999 is nontrivially palindromic in base 12.

It is not a de Polignac number, because 10215999 - 2¹⁵ = 10183231 is a prime.

It is a super-3 number, since 3×10215999³ (a number of 22 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10215599) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 567547 + ... + 567564.

Almost surely, 2^10215999 is an apocalyptic number.

10215999 is a deficient number, since it is larger than the sum of its proper divisors (4540457).

10215999 is a wasteful number, since it uses less digits than its factorization.

10215999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1135117 (or 1135114 counting only the distinct ones).

The product of its (nonzero) digits is 7290, while the sum is 36.

The square root of 10215999 is about 3196.2476437222. The cubic root of 10215999 is about 216.9836184339.

The spelling of 10215999 in words is "ten million, two hundred fifteen thousand, nine hundred ninety-nine".