31431327401 has 2 divisors, whose sum is σ = 31431327402. Its totient is φ = 31431327400.

The previous prime is 31431327377. The next prime is 31431327413. The reversal of 31431327401 is 10472313413.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 26390327401 + 5041000000 = 162451^2 + 71000^2 .

It is a cyclic number.

It is not a de Polignac number, because 31431327401 - 2¹⁸ = 31431065257 is a prime.

It is not a weakly prime, because it can be changed into another prime (31431327481) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15715663700 + 15715663701.

It is an arithmetic number, because the mean of its divisors is an integer number (15715663701).

Almost surely, 2^31431327401 is an apocalyptic number.

It is an amenable number.

31431327401 is a deficient number, since it is larger than the sum of its proper divisors (1).

31431327401 is an equidigital number, since it uses as much as digits as its factorization.

31431327401 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6048, while the sum is 29.

The spelling of 31431327401 in words is "thirty-one billion, four hundred thirty-one million, three hundred twenty-seven thousand, four hundred one".