31145305441 has 4 divisors (see below), whose sum is σ = 31152026772. Its totient is φ = 31138584112.

The previous prime is 31145305439. The next prime is 31145305453. The reversal of 31145305441 is 14450354113.

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 11676963600 + 19468341841 = 108060^2 + 139529^2 .

It is a cyclic number.

It is not a de Polignac number, because 31145305441 - 2¹ = 31145305439 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31845305441) 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, 3353710 + ... + 3362983.

It is an arithmetic number, because the mean of its divisors is an integer number (7788006693).

Almost surely, 2^31145305441 is an apocalyptic number.

It is an amenable number.

31145305441 is a deficient number, since it is larger than the sum of its proper divisors (6721331).

31145305441 is an equidigital number, since it uses as much as digits as its factorization.

31145305441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6721330.

The product of its (nonzero) digits is 14400, while the sum is 31.

Adding to 31145305441 its reverse (14450354113), we get a palindrome (45595659554).

The spelling of 31145305441 in words is "thirty-one billion, one hundred forty-five million, three hundred five thousand, four hundred forty-one".