31912823141 has 4 divisors (see below), whose sum is σ = 31932511884. Its totient is φ = 31893134400.

The previous prime is 31912823101. The next prime is 31912823161. The reversal of 31912823141 is 14132821913.

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 29602578916 + 2310244225 = 172054^2 + 48065^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31912823141 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 (31912823101) 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, 9841940 + ... + 9845181.

It is an arithmetic number, because the mean of its divisors is an integer number (7983127971).

Almost surely, 2^31912823141 is an apocalyptic number.

It is an amenable number.

31912823141 is a deficient number, since it is larger than the sum of its proper divisors (19688743).

31912823141 is a wasteful number, since it uses less digits than its factorization.

31912823141 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19688742.

The product of its digits is 10368, while the sum is 35.

The spelling of 31912823141 in words is "thirty-one billion, nine hundred twelve million, eight hundred twenty-three thousand, one hundred forty-one".