216325131 has 24 divisors (see below), whose sum is σ = 324434880. Its totient is φ = 128047920.

The previous prime is 216325121. The next prime is 216325163. The reversal of 216325131 is 131523612.

216325131 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 216325131 - 2¹³ = 216316939 is a prime.

It is a super-2 number, since 2×216325131² = 93593124604334322, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (216325121) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 8680 + ... + 22538.

It is an arithmetic number, because the mean of its divisors is an integer number (13518120).

Almost surely, 2^216325131 is an apocalyptic number.

216325131 is a deficient number, since it is larger than the sum of its proper divisors (108109749).

216325131 is a wasteful number, since it uses less digits than its factorization.

216325131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13927 (or 13916 counting only the distinct ones).

The product of its digits is 1080, while the sum is 24.

The square root of 216325131 is about 14707.9954786504. The cubic root of 216325131 is about 600.3008962994.

Adding to 216325131 its reverse (131523612), we get a palindrome (347848743).

The spelling of 216325131 in words is "two hundred sixteen million, three hundred twenty-five thousand, one hundred thirty-one".