213145136 has 20 divisors (see below), whose sum is σ = 413260752. Its totient is φ = 106497216.

The previous prime is 213145069. The next prime is 213145139. The reversal of 213145136 is 631541312.

It is not an unprimeable number, because it can be changed into a prime (213145139) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23885 + ... + 31571.

Almost surely, 2^213145136 is an apocalyptic number.

It is an amenable number.

213145136 is a deficient number, since it is larger than the sum of its proper divisors (200115616).

213145136 is a wasteful number, since it uses less digits than its factorization.

213145136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9428 (or 9422 counting only the distinct ones).

The product of its digits is 2160, while the sum is 26.

The square root of 213145136 is about 14599.4909500297. The cubic root of 213145136 is about 597.3448752597.

Adding to 213145136 its reverse (631541312), we get a palindrome (844686448).

The spelling of 213145136 in words is "two hundred thirteen million, one hundred forty-five thousand, one hundred thirty-six".