31524172145 has 16 divisors (see below), whose sum is σ = 39842504640. Its totient is φ = 23878505664.

The previous prime is 31524172103. The next prime is 31524172159. The reversal of 31524172145 is 54127142513.

It is not a de Polignac number, because 31524172145 - 2¹⁰ = 31524171121 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 76919 + ... + 262611.

It is an arithmetic number, because the mean of its divisors is an integer number (2490156540).

Almost surely, 2^31524172145 is an apocalyptic number.

It is an amenable number.

31524172145 is a deficient number, since it is larger than the sum of its proper divisors (8318332495).

31524172145 is a wasteful number, since it uses less digits than its factorization.

31524172145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 187504.

The product of its digits is 33600, while the sum is 35.

The spelling of 31524172145 in words is "thirty-one billion, five hundred twenty-four million, one hundred seventy-two thousand, one hundred forty-five".