31401431421407 has 2 divisors, whose sum is σ = 31401431421408. Its totient is φ = 31401431421406.

The previous prime is 31401431421377. The next prime is 31401431421443. The reversal of 31401431421407 is 70412413410413.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 31401431421407 - 2⁶ = 31401431421343 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31401431421467) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15700715710703 + 15700715710704.

It is an arithmetic number, because the mean of its divisors is an integer number (15700715710704).

Almost surely, 2^{31401431421407} is an apocalyptic number.

31401431421407 is a deficient number, since it is larger than the sum of its proper divisors (1).

31401431421407 is an equidigital number, since it uses as much as digits as its factorization.

31401431421407 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 32256, while the sum is 35.

The spelling of 31401431421407 in words is "thirty-one trillion, four hundred one billion, four hundred thirty-one million, four hundred twenty-one thousand, four hundred seven".