31406619401 has 2 divisors, whose sum is σ = 31406619402. Its totient is φ = 31406619400.

The previous prime is 31406619379. The next prime is 31406619427. The reversal of 31406619401 is 10491660413.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 22214412025 + 9192207376 = 149045^2 + 95876^2 .

It is a cyclic number.

It is not a de Polignac number, because 31406619401 - 2⁶ = 31406619337 is a prime.

It is not a weakly prime, because it can be changed into another prime (31406619481) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15703309700 + 15703309701.

It is an arithmetic number, because the mean of its divisors is an integer number (15703309701).

Almost surely, 2^31406619401 is an apocalyptic number.

It is an amenable number.

31406619401 is a deficient number, since it is larger than the sum of its proper divisors (1).

31406619401 is an equidigital number, since it uses as much as digits as its factorization.

31406619401 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 15552, while the sum is 35.

The spelling of 31406619401 in words is "thirty-one billion, four hundred six million, six hundred nineteen thousand, four hundred one".