31485510139 has 2 divisors, whose sum is σ = 31485510140. Its totient is φ = 31485510138.

The previous prime is 31485510103. The next prime is 31485510169. The reversal of 31485510139 is 93101558413.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 31485510139 - 2¹¹ = 31485508091 is a prime.

It is not a weakly prime, because it can be changed into another prime (31485510169) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15742755069 + 15742755070.

It is an arithmetic number, because the mean of its divisors is an integer number (15742755070).

Almost surely, 2^31485510139 is an apocalyptic number.

31485510139 is a deficient number, since it is larger than the sum of its proper divisors (1).

31485510139 is an equidigital number, since it uses as much as digits as its factorization.

31485510139 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 64800, while the sum is 40.

The spelling of 31485510139 in words is "thirty-one billion, four hundred eighty-five million, five hundred ten thousand, one hundred thirty-nine".