33231331013 has 2 divisors, whose sum is σ = 33231331014. Its totient is φ = 33231331012.

The previous prime is 33231330973. The next prime is 33231331019. The reversal of 33231331013 is 31013313233.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 26275437409 + 6955893604 = 162097^2 + 83402^2 .

It is a cyclic number.

It is not a de Polignac number, because 33231331013 - 2¹² = 33231326917 is a prime.

It is a super-2 number, since 2×33231331013² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 33231331013.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (33231331019) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16615665506 + 16615665507.

It is an arithmetic number, because the mean of its divisors is an integer number (16615665507).

Almost surely, 2^33231331013 is an apocalyptic number.

It is an amenable number.

33231331013 is a deficient number, since it is larger than the sum of its proper divisors (1).

33231331013 is an equidigital number, since it uses as much as digits as its factorization.

33231331013 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1458, while the sum is 23.

Adding to 33231331013 its reverse (31013313233), we get a palindrome (64244644246).

The spelling of 33231331013 in words is "thirty-three billion, two hundred thirty-one million, three hundred thirty-one thousand, thirteen".