31440421303 has 2 divisors, whose sum is σ = 31440421304. Its totient is φ = 31440421302.

The previous prime is 31440421301. The next prime is 31440421339. The reversal of 31440421303 is 30312404413.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 31440421303 - 2¹ = 31440421301 is a prime.

Together with 31440421301, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31440421301) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15720210651 + 15720210652.

It is an arithmetic number, because the mean of its divisors is an integer number (15720210652).

Almost surely, 2^31440421303 is an apocalyptic number.

31440421303 is a deficient number, since it is larger than the sum of its proper divisors (1).

31440421303 is an equidigital number, since it uses as much as digits as its factorization.

31440421303 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3456, while the sum is 25.

Adding to 31440421303 its reverse (30312404413), we get a palindrome (61752825716).

The spelling of 31440421303 in words is "thirty-one billion, four hundred forty million, four hundred twenty-one thousand, three hundred three".