31375442813 has 8 divisors (see below), whose sum is σ = 36860660256. Its totient is φ = 26329042800.

The previous prime is 31375442783. The next prime is 31375442827. The reversal of 31375442813 is 31824457313.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 31375442813 - 2⁸ = 31375442557 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 (31375442863) 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, 109704203 + ... + 109704488.

It is an arithmetic number, because the mean of its divisors is an integer number (4607582532).

Almost surely, 2^31375442813 is an apocalyptic number.

It is an amenable number.

31375442813 is a deficient number, since it is larger than the sum of its proper divisors (5485217443).

31375442813 is a wasteful number, since it uses less digits than its factorization.

31375442813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 219408715.

The product of its digits is 241920, while the sum is 41.

The spelling of 31375442813 in words is "thirty-one billion, three hundred seventy-five million, four hundred forty-two thousand, eight hundred thirteen".