31144222345 has 4 divisors (see below), whose sum is σ = 37373066820. Its totient is φ = 24915377872.

The previous prime is 31144222321. The next prime is 31144222367. The reversal of 31144222345 is 54322244113.

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 7677965376 + 23466256969 = 87624^2 + 153187^2 .

It is a cyclic number.

It is not a de Polignac number, because 31144222345 - 2⁷ = 31144222217 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3114422230 + ... + 3114422239.

It is an arithmetic number, because the mean of its divisors is an integer number (9343266705).

Almost surely, 2^31144222345 is an apocalyptic number.

It is an amenable number.

31144222345 is a deficient number, since it is larger than the sum of its proper divisors (6228844475).

31144222345 is an equidigital number, since it uses as much as digits as its factorization.

31144222345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6228844474.

The product of its digits is 23040, while the sum is 31.

Adding to 31144222345 its reverse (54322244113), we get a palindrome (85466466458).

The spelling of 31144222345 in words is "thirty-one billion, one hundred forty-four million, two hundred twenty-two thousand, three hundred forty-five".