215390625 has 32 divisors (see below), whose sum is σ = 359374080. Its totient is φ = 114750000.

The previous prime is 215390621. The next prime is 215390633. The reversal of 215390625 is 526093512.

215390625 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 215390625 - 2² = 215390621 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (215390621) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 233916 + ... + 234834.

It is an arithmetic number, because the mean of its divisors is an integer number (11230440).

Almost surely, 2^215390625 is an apocalyptic number.

215390625 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

215390625 is a deficient number, since it is larger than the sum of its proper divisors (143983455).

215390625 is an frugal number, since it uses more digits than its factorization.

215390625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 957 (or 927 counting only the distinct ones).

The product of its (nonzero) digits is 16200, while the sum is 33.

The square root of 215390625 is about 14676.1924558109. The cubic root of 215390625 is about 599.4352324517.

The spelling of 215390625 in words is "two hundred fifteen million, three hundred ninety thousand, six hundred twenty-five".