31203231233133 has 4 divisors (see below), whose sum is σ = 41604308310848. Its totient is φ = 20802154155420.

The previous prime is 31203231233089. The next prime is 31203231233261. The reversal of 31203231233133 is 33133213230213.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 31203231233133 - 2⁴⁴ = 13611045188717 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 31203231233133.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31203231233333) 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, 5200538538853 + ... + 5200538538858.

It is an arithmetic number, because the mean of its divisors is an integer number (10401077077712).

Almost surely, 2^{31203231233133} is an apocalyptic number.

It is an amenable number.

31203231233133 is a deficient number, since it is larger than the sum of its proper divisors (10401077077715).

31203231233133 is a wasteful number, since it uses less digits than its factorization.

31203231233133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10401077077714.

The product of its (nonzero) digits is 17496, while the sum is 30.

Adding to 31203231233133 its reverse (33133213230213), we get a palindrome (64336444463346).

The spelling of 31203231233133 in words is "thirty-one trillion, two hundred three billion, two hundred thirty-one million, two hundred thirty-three thousand, one hundred thirty-three".