31402334437 has 2 divisors, whose sum is σ = 31402334438. Its totient is φ = 31402334436.

The previous prime is 31402334377. The next prime is 31402334473. The reversal of 31402334437 is 73443320413.

Together with next prime (31402334473) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 30378398436 + 1023936001 = 174294^2 + 31999^2 .

It is an emirp because it is prime and its reverse (73443320413) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 31402334437 - 2¹¹ = 31402332389 is a prime.

It is a super-2 number, since 2×31402334437² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31402334497) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15701167218 + 15701167219.

It is an arithmetic number, because the mean of its divisors is an integer number (15701167219).

Almost surely, 2^31402334437 is an apocalyptic number.

It is an amenable number.

31402334437 is a deficient number, since it is larger than the sum of its proper divisors (1).

31402334437 is an equidigital number, since it uses as much as digits as its factorization.

31402334437 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 72576, while the sum is 34.

The spelling of 31402334437 in words is "thirty-one billion, four hundred two million, three hundred thirty-four thousand, four hundred thirty-seven".