31401364321 has 2 divisors, whose sum is σ = 31401364322. Its totient is φ = 31401364320.

The previous prime is 31401364283. The next prime is 31401364331. The reversal of 31401364321 is 12346310413.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 28076688721 + 3324675600 = 167561^2 + 57660^2 .

It is a cyclic number.

It is not a de Polignac number, because 31401364321 - 2⁹ = 31401363809 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 31401364321.

It is not a weakly prime, because it can be changed into another prime (31401364331) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15700682160 + 15700682161.

It is an arithmetic number, because the mean of its divisors is an integer number (15700682161).

Almost surely, 2^31401364321 is an apocalyptic number.

It is an amenable number.

31401364321 is a deficient number, since it is larger than the sum of its proper divisors (1).

31401364321 is an equidigital number, since it uses as much as digits as its factorization.

31401364321 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 28.

Adding to 31401364321 its reverse (12346310413), we get a palindrome (43747674734).

The spelling of 31401364321 in words is "thirty-one billion, four hundred one million, three hundred sixty-four thousand, three hundred twenty-one".