31173123311 has 8 divisors (see below), whose sum is σ = 34075200000. Its totient is φ = 28282406040.

The previous prime is 31173123287. The next prime is 31173123343. The reversal of 31173123311 is 11332137113.

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 a de Polignac number, because none of the positive numbers 2^k-31173123311 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 (31173123811) 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, 2834111 + ... + 2845088.

It is an arithmetic number, because the mean of its divisors is an integer number (4259400000).

Almost surely, 2^31173123311 is an apocalyptic number.

31173123311 is a deficient number, since it is larger than the sum of its proper divisors (2902076689).

31173123311 is a wasteful number, since it uses less digits than its factorization.

31173123311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5679709.

The product of its digits is 1134, while the sum is 26.

The spelling of 31173123311 in words is "thirty-one billion, one hundred seventy-three million, one hundred twenty-three thousand, three hundred eleven".