31143140437 has 2 divisors, whose sum is σ = 31143140438. Its totient is φ = 31143140436.

The previous prime is 31143140417. The next prime is 31143140459. The reversal of 31143140437 is 73404134113.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 24015390961 + 7127749476 = 154969^2 + 84426^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31143140437 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 31143140399 and 31143140408.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31143140417) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15571570218 + 15571570219.

It is an arithmetic number, because the mean of its divisors is an integer number (15571570219).

Almost surely, 2^31143140437 is an apocalyptic number.

It is an amenable number.

31143140437 is a deficient number, since it is larger than the sum of its proper divisors (1).

31143140437 is an equidigital number, since it uses as much as digits as its factorization.

31143140437 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12096, while the sum is 31.

The spelling of 31143140437 in words is "thirty-one billion, one hundred forty-three million, one hundred forty thousand, four hundred thirty-seven".