825670215 has 48 divisors (see below), whose sum is σ = 1497480192. Its totient is φ = 420057792.

The previous prime is 825670171. The next prime is 825670247. The reversal of 825670215 is 512076528.

It is a happy number.

825670215 is a `hidden beast` number, since 82 + 567 + 0 + 2 + 15 = 666.

It is not a de Polignac number, because 825670215 - 2⁸ = 825669959 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 825670215.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 478344 + ... + 480066.

It is an arithmetic number, because the mean of its divisors is an integer number (31197504).

Almost surely, 2^825670215 is an apocalyptic number.

825670215 is a deficient number, since it is larger than the sum of its proper divisors (671809977).

825670215 is a wasteful number, since it uses less digits than its factorization.

825670215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2220 (or 2217 counting only the distinct ones).

The product of its (nonzero) digits is 33600, while the sum is 36.

The square root of 825670215 is about 28734.4778097671. The cubic root of 825670215 is about 938.1426335230.

The spelling of 825670215 in words is "eight hundred twenty-five million, six hundred seventy thousand, two hundred fifteen".