213567131 has 4 divisors (see below), whose sum is σ = 215768952. Its totient is φ = 211365312.

The previous prime is 213567119. The next prime is 213567139. The reversal of 213567131 is 131765312.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 213567131 - 2¹⁰ = 213566107 is a prime.

It is a super-2 number, since 2×213567131² = 91221838887142322, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 213567094 and 213567103.

It is not an unprimeable number, because it can be changed into a prime (213567139) 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, 1100765 + ... + 1100958.

It is an arithmetic number, because the mean of its divisors is an integer number (53942238).

Almost surely, 2^213567131 is an apocalyptic number.

213567131 is a deficient number, since it is larger than the sum of its proper divisors (2201821).

213567131 is an equidigital number, since it uses as much as digits as its factorization.

213567131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2201820.

The product of its digits is 3780, while the sum is 29.

The square root of 213567131 is about 14613.9361911841. The cubic root of 213567131 is about 597.7388327611.

The spelling of 213567131 in words is "two hundred thirteen million, five hundred sixty-seven thousand, one hundred thirty-one".