31413210421 has 2 divisors, whose sum is σ = 31413210422. Its totient is φ = 31413210420.

The previous prime is 31413210403. The next prime is 31413210431. The reversal of 31413210421 is 12401231413.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17820915025 + 13592295396 = 133495^2 + 116586^2 .

It is a cyclic number.

It is not a de Polignac number, because 31413210421 - 2¹⁹ = 31412686133 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 31413210392 and 31413210401.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31413210431) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15706605210 + 15706605211.

It is an arithmetic number, because the mean of its divisors is an integer number (15706605211).

Almost surely, 2^31413210421 is an apocalyptic number.

It is an amenable number.

31413210421 is a deficient number, since it is larger than the sum of its proper divisors (1).

31413210421 is an equidigital number, since it uses as much as digits as its factorization.

31413210421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 576, while the sum is 22.

Adding to 31413210421 its reverse (12401231413), we get a palindrome (43814441834).

The spelling of 31413210421 in words is "thirty-one billion, four hundred thirteen million, two hundred ten thousand, four hundred twenty-one".