31403240441 has 2 divisors, whose sum is σ = 31403240442. Its totient is φ = 31403240440.

The previous prime is 31403240419. The next prime is 31403240501. The reversal of 31403240441 is 14404230413.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 31398422416 + 4818025 = 177196^2 + 2195^2 .

It is a cyclic number.

It is not a de Polignac number, because 31403240441 - 2⁶ = 31403240377 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 31403240441.

It is not a weakly prime, because it can be changed into another prime (31403248441) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15701620220 + 15701620221.

It is an arithmetic number, because the mean of its divisors is an integer number (15701620221).

Almost surely, 2^31403240441 is an apocalyptic number.

It is an amenable number.

31403240441 is a deficient number, since it is larger than the sum of its proper divisors (1).

31403240441 is an equidigital number, since it uses as much as digits as its factorization.

31403240441 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4608, while the sum is 26.

Adding to 31403240441 its reverse (14404230413), we get a palindrome (45807470854).

The spelling of 31403240441 in words is "thirty-one billion, four hundred three million, two hundred forty thousand, four hundred forty-one".