216413725 has 12 divisors (see below), whose sum is σ = 292749120. Its totient is φ = 157391600.

The previous prime is 216413719. The next prime is 216413741. The reversal of 216413725 is 527314612.

It is not a de Polignac number, because 216413725 - 2¹³ = 216405533 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, 393205 + ... + 393754.

It is an arithmetic number, because the mean of its divisors is an integer number (24395760).

Almost surely, 2^216413725 is an apocalyptic number.

216413725 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

216413725 is a deficient number, since it is larger than the sum of its proper divisors (76335395).

216413725 is a wasteful number, since it uses less digits than its factorization.

216413725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 786980 (or 786975 counting only the distinct ones).

The product of its digits is 10080, while the sum is 31.

The square root of 216413725 is about 14711.0069335855. The cubic root of 216413725 is about 600.3828343815.

The spelling of 216413725 in words is "two hundred sixteen million, four hundred thirteen thousand, seven hundred twenty-five".