31303002133 has 4 divisors (see below), whose sum is σ = 33710925388. Its totient is φ = 28895078880.

The previous prime is 31303002079. The next prime is 31303002163. The reversal of 31303002133 is 33120030313.

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 20462444209 + 10840557924 = 143047^2 + 104118^2 .

It is a cyclic number.

It is not a de Polignac number, because 31303002133 - 2¹³ = 31302993941 is a prime.

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 31303002133.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31303002163) 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, 1203961608 + ... + 1203961633.

It is an arithmetic number, because the mean of its divisors is an integer number (8427731347).

Almost surely, 2^31303002133 is an apocalyptic number.

It is an amenable number.

31303002133 is a deficient number, since it is larger than the sum of its proper divisors (2407923255).

31303002133 is a wasteful number, since it uses less digits than its factorization.

31303002133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2407923254.

The product of its (nonzero) digits is 486, while the sum is 19.

Adding to 31303002133 its reverse (33120030313), we get a palindrome (64423032446).

The spelling of 31303002133 in words is "thirty-one billion, three hundred three million, two thousand, one hundred thirty-three".