213363431 has 4 divisors (see below), whose sum is σ = 215563152. Its totient is φ = 211163712.

The previous prime is 213363391. The next prime is 213363487. The reversal of 213363431 is 134363312.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-213363431 is a prime.

It is a super-2 number, since 2×213363431² = 91047907376183522, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 213363431.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213365431) 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, 1099715 + ... + 1099908.

It is an arithmetic number, because the mean of its divisors is an integer number (53890788).

Almost surely, 2^213363431 is an apocalyptic number.

213363431 is a deficient number, since it is larger than the sum of its proper divisors (2199721).

213363431 is an equidigital number, since it uses as much as digits as its factorization.

213363431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2199720.

The product of its digits is 3888, while the sum is 26.

The square root of 213363431 is about 14606.9651536519. The cubic root of 213363431 is about 597.5487315167.

The spelling of 213363431 in words is "two hundred thirteen million, three hundred sixty-three thousand, four hundred thirty-one".