31661414443 has 4 divisors (see below), whose sum is σ = 31761293040. Its totient is φ = 31561535848.

The previous prime is 31661414429. The next prime is 31661414471. The reversal of 31661414443 is 34441416613.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 34441416613 = 1277 ⋅26970569.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31661414443 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31661414413) 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, 49938823 + ... + 49939456.

It is an arithmetic number, because the mean of its divisors is an integer number (7940323260).

Almost surely, 2^31661414443 is an apocalyptic number.

31661414443 is a deficient number, since it is larger than the sum of its proper divisors (99878597).

31661414443 is an equidigital number, since it uses as much as digits as its factorization.

31661414443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99878596.

The product of its digits is 82944, while the sum is 37.

The spelling of 31661414443 in words is "thirty-one billion, six hundred sixty-one million, four hundred fourteen thousand, four hundred forty-three".