213898331 has 2 divisors, whose sum is σ = 213898332. Its totient is φ = 213898330.

The previous prime is 213898327. The next prime is 213898337. The reversal of 213898331 is 133898312.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 213898331 - 2² = 213898327 is a prime.

It is a super-2 number, since 2×213898331² = 91504992009171122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (213898337) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106949165 + 106949166.

It is an arithmetic number, because the mean of its divisors is an integer number (106949166).

Almost surely, 2^213898331 is an apocalyptic number.

213898331 is a deficient number, since it is larger than the sum of its proper divisors (1).

213898331 is an equidigital number, since it uses as much as digits as its factorization.

213898331 is an evil number, because the sum of its binary digits is even.

The product of its digits is 31104, while the sum is 38.

The square root of 213898331 is about 14625.2634506186. The cubic root of 213898331 is about 598.0476643849.

The spelling of 213898331 in words is "two hundred thirteen million, eight hundred ninety-eight thousand, three hundred thirty-one".