31402334321 has 2 divisors, whose sum is σ = 31402334322. Its totient is φ = 31402334320.

The previous prime is 31402334281. The next prime is 31402334339. The reversal of 31402334321 is 12343320413.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 31219002721 + 183331600 = 176689^2 + 13540^2 .

It is a cyclic number.

It is not a de Polignac number, because 31402334321 - 2²² = 31398140017 is a prime.

It is a super-2 number, since 2×31402334321² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (31402334521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15701167160 + 15701167161.

It is an arithmetic number, because the mean of its divisors is an integer number (15701167161).

Almost surely, 2^31402334321 is an apocalyptic number.

It is an amenable number.

31402334321 is a deficient number, since it is larger than the sum of its proper divisors (1).

31402334321 is an equidigital number, since it uses as much as digits as its factorization.

31402334321 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5184, while the sum is 26.

Adding to 31402334321 its reverse (12343320413), we get a palindrome (43745654734).

The spelling of 31402334321 in words is "thirty-one billion, four hundred two million, three hundred thirty-four thousand, three hundred twenty-one".