31023020001313 has 8 divisors (see below), whose sum is σ = 32862228868008. Its totient is φ = 29185402838784.

The previous prime is 31023020001287. The next prime is 31023020001341. The reversal of 31023020001313 is 31310002032013.

It can be written as a sum of positive squares in 4 ways, for example, as 10766647500049 + 20256372501264 = 3281257^2 + 4500708^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31023020001313 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31023020001013) 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, 397885906 + ... + 397963867.

It is an arithmetic number, because the mean of its divisors is an integer number (4107778608501).

Almost surely, 2^{31023020001313} is an apocalyptic number.

It is an amenable number.

31023020001313 is a deficient number, since it is larger than the sum of its proper divisors (1839208866695).

31023020001313 is a wasteful number, since it uses less digits than its factorization.

31023020001313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 795852083.

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

Adding to 31023020001313 its reverse (31310002032013), we get a palindrome (62333022033326).

The spelling of 31023020001313 in words is "thirty-one trillion, twenty-three billion, twenty million, one thousand, three hundred thirteen".