31465597945 has 4 divisors (see below), whose sum is σ = 37758717540. Its totient is φ = 25172478352.

The previous prime is 31465597883. The next prime is 31465597949. The reversal of 31465597945 is 54979556413.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 54979556413 = 53 ⋅1037350121.

It can be written as a sum of positive squares in 2 ways, for example, as 14196484201 + 17269113744 = 119149^2 + 131412^2 .

It is a cyclic number.

It is not a de Polignac number, because 31465597945 - 2⁹ = 31465597433 is a prime.

It is a Smith number, since the sum of its digits (58) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 31465597945.

It is not an unprimeable number, because it can be changed into a prime (31465597949) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3146559790 + ... + 3146559799.

It is an arithmetic number, because the mean of its divisors is an integer number (9439679385).

Almost surely, 2^31465597945 is an apocalyptic number.

It is an amenable number.

31465597945 is a deficient number, since it is larger than the sum of its proper divisors (6293119595).

31465597945 is an equidigital number, since it uses as much as digits as its factorization.

31465597945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6293119594.

The product of its digits is 20412000, while the sum is 58.

The spelling of 31465597945 in words is "thirty-one billion, four hundred sixty-five million, five hundred ninety-seven thousand, nine hundred forty-five".