215364225 has 24 divisors (see below), whose sum is σ = 356491072. Its totient is φ = 114724800.

The previous prime is 215364217. The next prime is 215364251. The reversal of 215364225 is 522463512.

It is not a de Polignac number, because 215364225 - 2³ = 215364217 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 215364192 and 215364201.

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, 114795 + ... + 116655.

Almost surely, 2^215364225 is an apocalyptic number.

215364225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

215364225 is a deficient number, since it is larger than the sum of its proper divisors (141126847).

215364225 is a wasteful number, since it uses less digits than its factorization.

215364225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3417 (or 3412 counting only the distinct ones).

The product of its digits is 14400, while the sum is 30.

The square root of 215364225 is about 14675.2930124069. The cubic root of 215364225 is about 599.4107409235.

The spelling of 215364225 in words is "two hundred fifteen million, three hundred sixty-four thousand, two hundred twenty-five".