31032031133 has 4 divisors (see below), whose sum is σ = 31339279068. Its totient is φ = 30724783200.

The previous prime is 31032031127. The next prime is 31032031157. The reversal of 31032031133 is 33113023013.

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 20752707364 + 10279323769 = 144058^2 + 101387^2 .

It is a cyclic number.

It is not a de Polignac number, because 31032031133 - 2³⁴ = 13852161949 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31032031033) 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, 153623816 + ... + 153624017.

It is an arithmetic number, because the mean of its divisors is an integer number (7834819767).

Almost surely, 2^31032031133 is an apocalyptic number.

It is an amenable number.

31032031133 is a deficient number, since it is larger than the sum of its proper divisors (307247935).

31032031133 is a wasteful number, since it uses less digits than its factorization.

31032031133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 307247934.

The product of its (nonzero) digits is 486, while the sum is 20.

Adding to 31032031133 its reverse (33113023013), we get a palindrome (64145054146).

The spelling of 31032031133 in words is "thirty-one billion, thirty-two million, thirty-one thousand, one hundred thirty-three".