31342244161 has 4 divisors (see below), whose sum is σ = 31345989552. Its totient is φ = 31338498772.

The previous prime is 31342244147. The next prime is 31342244177. The reversal of 31342244161 is 16144224313.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 16144224313 = 7 ⋅2306317759.

It is a cyclic number.

It is not a de Polignac number, because 31342244161 - 2⁷ = 31342244033 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31342244111) 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, 1860115 + ... + 1876888.

It is an arithmetic number, because the mean of its divisors is an integer number (7836497388).

Almost surely, 2^31342244161 is an apocalyptic number.

It is an amenable number.

31342244161 is a deficient number, since it is larger than the sum of its proper divisors (3745391).

31342244161 is an equidigital number, since it uses as much as digits as its factorization.

31342244161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3745390.

The product of its digits is 13824, while the sum is 31.

Adding to 31342244161 its reverse (16144224313), we get a palindrome (47486468474).

The spelling of 31342244161 in words is "thirty-one billion, three hundred forty-two million, two hundred forty-four thousand, one hundred sixty-one".