31232401133 has 2 divisors, whose sum is σ = 31232401134. Its totient is φ = 31232401132.

The previous prime is 31232401117. The next prime is 31232401157. The reversal of 31232401133 is 33110423213.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 25197752644 + 6034648489 = 158738^2 + 77683^2 .

It is a cyclic number.

It is not a de Polignac number, because 31232401133 - 2⁴ = 31232401117 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 31232401099 and 31232401108.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31232401163) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15616200566 + 15616200567.

It is an arithmetic number, because the mean of its divisors is an integer number (15616200567).

Almost surely, 2^31232401133 is an apocalyptic number.

It is an amenable number.

31232401133 is a deficient number, since it is larger than the sum of its proper divisors (1).

31232401133 is an equidigital number, since it uses as much as digits as its factorization.

31232401133 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1296, while the sum is 23.

Adding to 31232401133 its reverse (33110423213), we get a palindrome (64342824346).

The spelling of 31232401133 in words is "thirty-one billion, two hundred thirty-two million, four hundred one thousand, one hundred thirty-three".