31323213001 has 4 divisors (see below), whose sum is σ = 31344250900. Its totient is φ = 31302175104.

The previous prime is 31323212989. The next prime is 31323213017. The reversal of 31323213001 is 10031232313.

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

It can be written as a sum of positive squares in 2 ways, for example, as 20614067776 + 10709145225 = 143576^2 + 103485^2 .

It is a cyclic number.

It is not a de Polignac number, because 31323213001 - 2⁵ = 31323212969 is a prime.

It is a super-2 number, since 2×31323213001² (a number of 22 digits) 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 31323213001.

It is not an unprimeable number, because it can be changed into a prime (31323213041) 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, 10516716 + ... + 10519693.

It is an arithmetic number, because the mean of its divisors is an integer number (7836062725).

Almost surely, 2^31323213001 is an apocalyptic number.

It is an amenable number.

31323213001 is a deficient number, since it is larger than the sum of its proper divisors (21037899).

31323213001 is a wasteful number, since it uses less digits than its factorization.

31323213001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21037898.

The product of its (nonzero) digits is 324, while the sum is 19.

Adding to 31323213001 its reverse (10031232313), we get a palindrome (41354445314).

The spelling of 31323213001 in words is "thirty-one billion, three hundred twenty-three million, two hundred thirteen thousand, one".