216526413 has 32 divisors (see below), whose sum is σ = 315535360. Its totient is φ = 131569920.

The previous prime is 216526403. The next prime is 216526417. The reversal of 216526413 is 314625612.

It is not a de Polignac number, because 216526413 - 2⁴ = 216526397 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216526417) 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, 499845 + ... + 500277.

It is an arithmetic number, because the mean of its divisors is an integer number (9860480).

Almost surely, 2^216526413 is an apocalyptic number.

It is an amenable number.

216526413 is a deficient number, since it is larger than the sum of its proper divisors (99008947).

216526413 is a wasteful number, since it uses less digits than its factorization.

216526413 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 769.

The product of its digits is 8640, while the sum is 30.

The square root of 216526413 is about 14714.8364924657. The cubic root of 216526413 is about 600.4870240168.

The spelling of 216526413 in words is "two hundred sixteen million, five hundred twenty-six thousand, four hundred thirteen".