31222975871 has 4 divisors (see below), whose sum is σ = 31233390000. Its totient is φ = 31212561744.

The previous prime is 31222975859. The next prime is 31222975913. The reversal of 31222975871 is 17857922213.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31222975871 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 (31222905871) 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 3 ways as a sum of consecutive naturals, for example, 5202566 + ... + 5208563.

It is an arithmetic number, because the mean of its divisors is an integer number (7808347500).

Almost surely, 2^31222975871 is an apocalyptic number.

31222975871 is a deficient number, since it is larger than the sum of its proper divisors (10414129).

31222975871 is a wasteful number, since it uses less digits than its factorization.

31222975871 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10414128.

The product of its digits is 423360, while the sum is 47.

The spelling of 31222975871 in words is "thirty-one billion, two hundred twenty-two million, nine hundred seventy-five thousand, eight hundred seventy-one".