215296925 has 24 divisors (see below), whose sum is σ = 283481856. Its totient is φ = 161642240.

The previous prime is 215296897. The next prime is 215296931. The reversal of 215296925 is 529692512.

It is a de Polignac number, because none of the positive numbers 2^k-215296925 is a prime.

It is a Duffinian number.

It is a Curzon number.

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, 249044 + ... + 249906.

It is an arithmetic number, because the mean of its divisors is an integer number (11811744).

Almost surely, 2^215296925 is an apocalyptic number.

215296925 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

215296925 is a deficient number, since it is larger than the sum of its proper divisors (68184931).

215296925 is a wasteful number, since it uses less digits than its factorization.

215296925 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1477 (or 1472 counting only the distinct ones).

The product of its digits is 97200, while the sum is 41.

The square root of 215296925 is about 14672.9998636952. Note that the first 3 decimals coincide. The cubic root of 215296925 is about 599.3482970246.

The spelling of 215296925 in words is "two hundred fifteen million, two hundred ninety-six thousand, nine hundred twenty-five".