213116637 has 16 divisors (see below), whose sum is σ = 287179200. Its totient is φ = 140573952.

The previous prime is 213116623. The next prime is 213116639. The reversal of 213116637 is 736611312.

It is not a de Polignac number, because 213116637 - 2⁷ = 213116509 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213116639) 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, 136453 + ... + 138005.

It is an arithmetic number, because the mean of its divisors is an integer number (17948700).

Almost surely, 2^213116637 is an apocalyptic number.

It is an amenable number.

213116637 is a deficient number, since it is larger than the sum of its proper divisors (74062563).

213116637 is a wasteful number, since it uses less digits than its factorization.

213116637 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2012.

The product of its digits is 4536, while the sum is 30.

The square root of 213116637 is about 14598.5148902209. The cubic root of 213116637 is about 597.3182510062.

Adding to 213116637 its reverse (736611312), we get a palindrome (949727949).

The spelling of 213116637 in words is "two hundred thirteen million, one hundred sixteen thousand, six hundred thirty-seven".