216132405 has 16 divisors (see below), whose sum is σ = 353855040. Its totient is φ = 112589568.

The previous prime is 216132379. The next prime is 216132409. The reversal of 216132405 is 504231612.

It is not a de Polignac number, because 216132405 - 2⁸ = 216132149 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216132409) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 166900 + ... + 168189.

It is an arithmetic number, because the mean of its divisors is an integer number (22115940).

Almost surely, 2^216132405 is an apocalyptic number.

It is an amenable number.

216132405 is a deficient number, since it is larger than the sum of its proper divisors (137722635).

216132405 is a wasteful number, since it uses less digits than its factorization.

216132405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 335140.

The product of its (nonzero) digits is 1440, while the sum is 24.

The square root of 216132405 is about 14701.4422761850. The cubic root of 216132405 is about 600.1225721806.

The spelling of 216132405 in words is "two hundred sixteen million, one hundred thirty-two thousand, four hundred five".