31233001312013 has 4 divisors (see below), whose sum is σ = 31233022888188. Its totient is φ = 31232979735840.

The previous prime is 31233001311937. The next prime is 31233001312033. The reversal of 31233001312013 is 31021310033213.

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 4399078370404 + 26833922941609 = 2097398^2 + 5180147^2 .

It is a cyclic number.

It is not a de Polignac number, because 31233001312013 - 2¹² = 31233001307917 is a prime.

It is a super-2 number, since 2×31233001312013² (a number of 28 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 31233001312013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31233001312033) 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, 8447456 + ... + 11568297.

It is an arithmetic number, because the mean of its divisors is an integer number (7808255722047).

Almost surely, 2^{31233001312013} is an apocalyptic number.

It is an amenable number.

31233001312013 is a deficient number, since it is larger than the sum of its proper divisors (21576175).

31233001312013 is a wasteful number, since it uses less digits than its factorization.

31233001312013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21576174.

The product of its (nonzero) digits is 972, while the sum is 23.

Adding to 31233001312013 its reverse (31021310033213), we get a palindrome (62254311345226).

The spelling of 31233001312013 in words is "thirty-one trillion, two hundred thirty-three billion, one million, three hundred twelve thousand, thirteen".