213353131 has 4 divisors (see below), whose sum is σ = 213382512. Its totient is φ = 213323752.

The previous prime is 213353113. The next prime is 213353159. The reversal of 213353131 is 131353312.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 213353131 - 2²⁵ = 179798699 is a prime.

It is a super-2 number, since 2×213353131² = 91039117015006322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (213353431) 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, 5001 + ... + 21253.

It is an arithmetic number, because the mean of its divisors is an integer number (53345628).

Almost surely, 2^213353131 is an apocalyptic number.

213353131 is a deficient number, since it is larger than the sum of its proper divisors (29381).

213353131 is a wasteful number, since it uses less digits than its factorization.

213353131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29380.

The product of its digits is 810, while the sum is 22.

The square root of 213353131 is about 14606.6125778703. The cubic root of 213353131 is about 597.5391159187.

The spelling of 213353131 in words is "two hundred thirteen million, three hundred fifty-three thousand, one hundred thirty-one".