31042211345 has 16 divisors (see below), whose sum is σ = 38265080400. Its totient is φ = 24157753344.

The previous prime is 31042211341. The next prime is 31042211357. The reversal of 31042211345 is 54311224013.

It is a happy number.

It is a Cunningham number, because it is equal to 176188²+1.

It can be written as a sum of positive squares in 8 ways, for example, as 2946752656 + 28095458689 = 54284^2 + 167617^2 .

It is a cyclic number.

It is not a de Polignac number, because 31042211345 - 2² = 31042211341 is a prime.

It is not an unprimeable number, because it can be changed into a prime (31042211341) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1117181 + ... + 1144629.

It is an arithmetic number, because the mean of its divisors is an integer number (2391567525).

Almost surely, 2^31042211345 is an apocalyptic number.

It is an amenable number.

31042211345 is a deficient number, since it is larger than the sum of its proper divisors (7222869055).

31042211345 is a wasteful number, since it uses less digits than its factorization.

31042211345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33604.

The product of its (nonzero) digits is 2880, while the sum is 26.

Adding to 31042211345 its reverse (54311224013), we get a palindrome (85353435358).

The spelling of 31042211345 in words is "thirty-one billion, forty-two million, two hundred eleven thousand, three hundred forty-five".