31300122193 has 4 divisors (see below), whose sum is σ = 31459006260. Its totient is φ = 31141238128.

The previous prime is 31300122157. The next prime is 31300122199. The reversal of 31300122193 is 39122100313.

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

It can be written as a sum of positive squares in 2 ways, for example, as 30851868609 + 448253584 = 175647^2 + 21172^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31300122193 is a prime.

It is a super-2 number, since 2×31300122193² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31300122199) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 79441738 + ... + 79442131.

It is an arithmetic number, because the mean of its divisors is an integer number (7864751565).

Almost surely, 2^31300122193 is an apocalyptic number.

It is an amenable number.

31300122193 is a deficient number, since it is larger than the sum of its proper divisors (158884067).

31300122193 is a wasteful number, since it uses less digits than its factorization.

31300122193 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 158884066.

The product of its (nonzero) digits is 972, while the sum is 25.

The spelling of 31300122193 in words is "thirty-one billion, three hundred million, one hundred twenty-two thousand, one hundred ninety-three".