31381372772403 has 8 divisors (see below), whose sum is σ = 44303114502288. Its totient is φ = 19690273112064.

The previous prime is 31381372772371. The next prime is 31381372772411. The reversal of 31381372772403 is 30427727318313.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 31381372772403 - 2⁵ = 31381372772371 is a prime.

It is a Smith number, since the sum of its digits (51) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Harshad number since it is a multiple of its sum of digits (51), and also a Moran number because the ratio is a prime number: 615321034753 = 31381372772403 / (3 + 1 + 3 + 8 + 1 + 3 + 7 + 2 + 7 + 7 + 2 + 4 + 0 + 3).

It is not an unprimeable number, because it can be changed into a prime (31381372772483) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 307660517326 + ... + 307660517427.

It is an arithmetic number, because the mean of its divisors is an integer number (5537889312786).

Almost surely, 2^{31381372772403} is an apocalyptic number.

31381372772403 is a deficient number, since it is larger than the sum of its proper divisors (12921741729885).

31381372772403 is a wasteful number, since it uses less digits than its factorization.

31381372772403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 615321034773.

The product of its (nonzero) digits is 3556224, while the sum is 51.

The spelling of 31381372772403 in words is "thirty-one trillion, three hundred eighty-one billion, three hundred seventy-two million, seven hundred seventy-two thousand, four hundred three".