31401364273 has 2 divisors, whose sum is σ = 31401364274. Its totient is φ = 31401364272.

The previous prime is 31401364271. The next prime is 31401364283. The reversal of 31401364273 is 37246310413.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 28208210209 + 3193154064 = 167953^2 + 56508^2 .

It is a cyclic number.

It is not a de Polignac number, because 31401364273 - 2¹ = 31401364271 is a prime.

Together with 31401364271, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (31401364271) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15700682136 + 15700682137.

It is an arithmetic number, because the mean of its divisors is an integer number (15700682137).

Almost surely, 2^31401364273 is an apocalyptic number.

It is an amenable number.

31401364273 is a deficient number, since it is larger than the sum of its proper divisors (1).

31401364273 is an equidigital number, since it uses as much as digits as its factorization.

31401364273 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 36288, while the sum is 34.

Adding to 31401364273 its reverse (37246310413), we get a palindrome (68647674686).

The spelling of 31401364273 in words is "thirty-one billion, four hundred one million, three hundred sixty-four thousand, two hundred seventy-three".