31371320351 has 16 divisors (see below), whose sum is σ = 36838149696. Its totient is φ = 26151434496.

The previous prime is 31371320333. The next prime is 31371320369. The reversal of 31371320351 is 15302317313.

It is an interprime number because it is at equal distance from previous prime (31371320333) and next prime (31371320369).

It is a cyclic number.

It is not a de Polignac number, because 31371320351 - 2¹⁸ = 31371058207 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 (31371320551) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 590165 + ... + 641121.

It is an arithmetic number, because the mean of its divisors is an integer number (2302384356).

Almost surely, 2^31371320351 is an apocalyptic number.

31371320351 is a deficient number, since it is larger than the sum of its proper divisors (5466829345).

31371320351 is a wasteful number, since it uses less digits than its factorization.

31371320351 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53378.

The product of its (nonzero) digits is 5670, while the sum is 29.

Adding to 31371320351 its reverse (15302317313), we get a palindrome (46673637664).

The spelling of 31371320351 in words is "thirty-one billion, three hundred seventy-one million, three hundred twenty thousand, three hundred fifty-one".