31485511163 has 2 divisors, whose sum is σ = 31485511164. Its totient is φ = 31485511162.

The previous prime is 31485511153. The next prime is 31485511193. The reversal of 31485511163 is 36111558413.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 31485511163 - 2¹⁰ = 31485510139 is a prime.

It is a super-2 number, since 2×31485511163² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (31485511153) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15742755581 + 15742755582.

It is an arithmetic number, because the mean of its divisors is an integer number (15742755582).

Almost surely, 2^31485511163 is an apocalyptic number.

31485511163 is a deficient number, since it is larger than the sum of its proper divisors (1).

31485511163 is an equidigital number, since it uses as much as digits as its factorization.

31485511163 is an evil number, because the sum of its binary digits is even.

The product of its digits is 43200, while the sum is 38.

The spelling of 31485511163 in words is "thirty-one billion, four hundred eighty-five million, five hundred eleven thousand, one hundred sixty-three".