216415325 has 12 divisors (see below), whose sum is σ = 306691680. Its totient is φ = 148398960.

The previous prime is 216415319. The next prime is 216415351. The reversal of 216415325 is 523514612.

It is not a de Polignac number, because 216415325 - 2¹² = 216411229 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 618155 + ... + 618504.

It is an arithmetic number, because the mean of its divisors is an integer number (25557640).

Almost surely, 2^216415325 is an apocalyptic number.

216415325 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

216415325 is a deficient number, since it is larger than the sum of its proper divisors (90276355).

216415325 is a wasteful number, since it uses less digits than its factorization.

216415325 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1236676 (or 1236671 counting only the distinct ones).

The product of its digits is 7200, while the sum is 29.

The square root of 216415325 is about 14711.0613145347. The cubic root of 216415325 is about 600.3843139706.

Adding to 216415325 its reverse (523514612), we get a palindrome (739929937).

The spelling of 216415325 in words is "two hundred sixteen million, four hundred fifteen thousand, three hundred twenty-five".