31243234213 has 4 divisors (see below), whose sum is σ = 31546566688. Its totient is φ = 30939901740.

The previous prime is 31243234199. The next prime is 31243234241.

It is a happy number.

31243234213 is nontrivially palindromic in base 10.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31243234213 is a prime.

It is a super-2 number, since 2×31243234213² (a number of 22 digits) 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 (31243234613) 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, 151666083 + ... + 151666288.

It is an arithmetic number, because the mean of its divisors is an integer number (7886641672).

Almost surely, 2^31243234213 is an apocalyptic number.

It is an amenable number.

31243234213 is a deficient number, since it is larger than the sum of its proper divisors (303332475).

31243234213 is a wasteful number, since it uses less digits than its factorization.

31243234213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 303332474.

The product of its digits is 10368, while the sum is 28.

The spelling of 31243234213 in words is "thirty-one billion, two hundred forty-three million, two hundred thirty-four thousand, two hundred thirteen".