31032205133 has 4 divisors (see below), whose sum is σ = 31040797788. Its totient is φ = 31023612480.

The previous prime is 31032205109. The next prime is 31032205157. The reversal of 31032205133 is 33150223013.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (31032205109) and next prime (31032205157).

It can be written as a sum of positive squares in 2 ways, for example, as 14822332009 + 16209873124 = 121747^2 + 127318^2 .

It is a cyclic number.

It is not a de Polignac number, because 31032205133 - 2¹⁶ = 31032139597 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 31032205099 and 31032205108.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31032205333) 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, 4290908 + ... + 4298133.

It is an arithmetic number, because the mean of its divisors is an integer number (7760199447).

Almost surely, 2^31032205133 is an apocalyptic number.

It is an amenable number.

31032205133 is a deficient number, since it is larger than the sum of its proper divisors (8592655).

31032205133 is an equidigital number, since it uses as much as digits as its factorization.

31032205133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8592654.

The product of its (nonzero) digits is 1620, while the sum is 23.

Adding to 31032205133 its reverse (33150223013), we get a palindrome (64182428146).

The spelling of 31032205133 in words is "thirty-one billion, thirty-two million, two hundred five thousand, one hundred thirty-three".