31540214441 has 2 divisors, whose sum is σ = 31540214442. Its totient is φ = 31540214440.

The previous prime is 31540214417. The next prime is 31540214507. The reversal of 31540214441 is 14441204513.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 30431058025 + 1109156416 = 174445^2 + 33304^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31540214441 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (31540214141) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15770107220 + 15770107221.

It is an arithmetic number, because the mean of its divisors is an integer number (15770107221).

Almost surely, 2^31540214441 is an apocalyptic number.

It is an amenable number.

31540214441 is a deficient number, since it is larger than the sum of its proper divisors (1).

31540214441 is an equidigital number, since it uses as much as digits as its factorization.

31540214441 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7680, while the sum is 29.

Adding to 31540214441 its reverse (14441204513), we get a palindrome (45981418954).

The spelling of 31540214441 in words is "thirty-one billion, five hundred forty million, two hundred fourteen thousand, four hundred forty-one".