31431535241437 has 2 divisors, whose sum is σ = 31431535241438. Its totient is φ = 31431535241436.

The previous prime is 31431535241419. The next prime is 31431535241467. The reversal of 31431535241437 is 73414253513413.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 25275846745081 + 6155688496356 = 5027509^2 + 2481066^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31431535241437 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31431535241467) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15715767620718 + 15715767620719.

It is an arithmetic number, because the mean of its divisors is an integer number (15715767620719).

Almost surely, 2^{31431535241437} is an apocalyptic number.

It is an amenable number.

31431535241437 is a deficient number, since it is larger than the sum of its proper divisors (1).

31431535241437 is an equidigital number, since it uses as much as digits as its factorization.

31431535241437 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1814400, while the sum is 46.

The spelling of 31431535241437 in words is "thirty-one trillion, four hundred thirty-one billion, five hundred thirty-five million, two hundred forty-one thousand, four hundred thirty-seven".