213412031 has 4 divisors (see below), whose sum is σ = 243899472. Its totient is φ = 182924592.

The previous prime is 213412021. The next prime is 213412039. The reversal of 213412031 is 130214312.

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-213412031 is a prime.

It is a super-2 number, since 2×213412031² = 91089389951089922, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213412039) 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, 15243710 + ... + 15243723.

It is an arithmetic number, because the mean of its divisors is an integer number (60974868).

Almost surely, 2^213412031 is an apocalyptic number.

213412031 is a deficient number, since it is larger than the sum of its proper divisors (30487441).

213412031 is an equidigital number, since it uses as much as digits as its factorization.

213412031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30487440.

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 213412031 is about 14608.6286488500. The cubic root of 213412031 is about 597.5940980282.

Adding to 213412031 its reverse (130214312), we get a palindrome (343626343).

The spelling of 213412031 in words is "two hundred thirteen million, four hundred twelve thousand, thirty-one".