213331031 has 8 divisors (see below), whose sum is σ = 225495600. Its totient is φ = 201260160.

The previous prime is 213331007. The next prime is 213331037. The reversal of 213331031 is 130133312.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-213331031 is a prime.

It is a super-2 number, since 2×213331031² = 91020257575045922, 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 (213331037) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18716 + ... + 27873.

It is an arithmetic number, because the mean of its divisors is an integer number (28186950).

Almost surely, 2^213331031 is an apocalyptic number.

213331031 is a deficient number, since it is larger than the sum of its proper divisors (12164569).

213331031 is a wasteful number, since it uses less digits than its factorization.

213331031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46849.

The product of its (nonzero) digits is 162, while the sum is 17.

The square root of 213331031 is about 14605.8560515979. The cubic root of 213331031 is about 597.5184833483.

Adding to 213331031 its reverse (130133312), we get a palindrome (343464343).

The spelling of 213331031 in words is "two hundred thirteen million, three hundred thirty-one thousand, thirty-one".