31321400202431 has 2 divisors, whose sum is σ = 31321400202432. Its totient is φ = 31321400202430.

The previous prime is 31321400202247. The next prime is 31321400202439. The reversal of 31321400202431 is 13420200412313.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 31321400202431 - 2¹⁰ = 31321400201407 is a prime.

It is a super-2 number, since 2×31321400202431² (a number of 28 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 31321400202431.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31321400202439) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15660700101215 + 15660700101216.

It is an arithmetic number, because the mean of its divisors is an integer number (15660700101216).

Almost surely, 2^{31321400202431} is an apocalyptic number.

31321400202431 is a deficient number, since it is larger than the sum of its proper divisors (1).

31321400202431 is an equidigital number, since it uses as much as digits as its factorization.

31321400202431 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 26.

Adding to 31321400202431 its reverse (13420200412313), we get a palindrome (44741600614744).

The spelling of 31321400202431 in words is "thirty-one trillion, three hundred twenty-one billion, four hundred million, two hundred two thousand, four hundred thirty-one".