213136140 has 96 divisors (see below), whose sum is σ = 722179584. Its totient is φ = 45849600.

The previous prime is 213136139. The next prime is 213136141. The reversal of 213136140 is 41631312.

It is an interprime number because it is at equal distance from previous prime (213136139) and next prime (213136141).

It is a Harshad number since it is a multiple of its sum of digits (21).

It is not an unprimeable number, because it can be changed into a prime (213136141) 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, 7786 + ... + 22065.

It is an arithmetic number, because the mean of its divisors is an integer number (7522704).

Almost surely, 2^213136140 is an apocalyptic number.

213136140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

213136140 is an abundant number, since it is smaller than the sum of its proper divisors (509043444).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

213136140 is a wasteful number, since it uses less digits than its factorization.

213136140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29887 (or 29885 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 21.

The square root of 213136140 is about 14599.1828538449. The cubic root of 213136140 is about 597.3364712989.

Adding to 213136140 its reverse (41631312), we get a palindrome (254767452).

The spelling of 213136140 in words is "two hundred thirteen million, one hundred thirty-six thousand, one hundred forty".