31254541421641 has 2 divisors, whose sum is σ = 31254541421642. Its totient is φ = 31254541421640.

The previous prime is 31254541421633. The next prime is 31254541421669. The reversal of 31254541421641 is 14612414545213.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 30472652201616 + 781889220025 = 5520204^2 + 884245^2 .

It is a cyclic number.

It is not a de Polignac number, because 31254541421641 - 2³ = 31254541421633 is a prime.

It is not a weakly prime, because it can be changed into another prime (31254541421671) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15627270710820 + 15627270710821.

It is an arithmetic number, because the mean of its divisors is an integer number (15627270710821).

Almost surely, 2^{31254541421641} is an apocalyptic number.

It is an amenable number.

31254541421641 is a deficient number, since it is larger than the sum of its proper divisors (1).

31254541421641 is an equidigital number, since it uses as much as digits as its factorization.

31254541421641 is an evil number, because the sum of its binary digits is even.

The product of its digits is 460800, while the sum is 43.

Adding to 31254541421641 its reverse (14612414545213), we get a palindrome (45866955966854).

The spelling of 31254541421641 in words is "thirty-one trillion, two hundred fifty-four billion, five hundred forty-one million, four hundred twenty-one thousand, six hundred forty-one".