31540444241 has 4 divisors (see below), whose sum is σ = 31541485632. Its totient is φ = 31539402852.

The previous prime is 31540444237. The next prime is 31540444279. The reversal of 31540444241 is 14244404513.

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.

It is a cyclic number.

It is not a de Polignac number, because 31540444241 - 2² = 31540444237 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 31540444198 and 31540444207.

It is not an unprimeable number, because it can be changed into a prime (31540444211) 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, 473861 + ... + 536306.

It is an arithmetic number, because the mean of its divisors is an integer number (7885371408).

Almost surely, 2^31540444241 is an apocalyptic number.

It is an amenable number.

31540444241 is a deficient number, since it is larger than the sum of its proper divisors (1041391).

31540444241 is a wasteful number, since it uses less digits than its factorization.

31540444241 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1041390.

The product of its (nonzero) digits is 30720, while the sum is 32.

Adding to 31540444241 its reverse (14244404513), we get a palindrome (45784848754).

The spelling of 31540444241 in words is "thirty-one billion, five hundred forty million, four hundred forty-four thousand, two hundred forty-one".