31455305137 has 2 divisors, whose sum is σ = 31455305138. Its totient is φ = 31455305136.

The previous prime is 31455305131. The next prime is 31455305159. The reversal of 31455305137 is 73150355413.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19000968336 + 12454336801 = 137844^2 + 111599^2 .

It is an emirp because it is prime and its reverse (73150355413) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 31455305137 - 2¹⁹ = 31454780849 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 31455305096 and 31455305105.

It is not a weakly prime, because it can be changed into another prime (31455305131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15727652568 + 15727652569.

It is an arithmetic number, because the mean of its divisors is an integer number (15727652569).

Almost surely, 2^31455305137 is an apocalyptic number.

It is an amenable number.

31455305137 is a deficient number, since it is larger than the sum of its proper divisors (1).

31455305137 is an equidigital number, since it uses as much as digits as its factorization.

31455305137 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 94500, while the sum is 37.

The spelling of 31455305137 in words is "thirty-one billion, four hundred fifty-five million, three hundred five thousand, one hundred thirty-seven".