31205005249 has 16 divisors (see below), whose sum is σ = 35392625856. Its totient is φ = 27263174400.

The previous prime is 31205005229. The next prime is 31205005259. The reversal of 31205005249 is 94250050213.

It is not a de Polignac number, because 31205005249 - 2⁵ = 31205005217 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 31205005249.

It is not an unprimeable number, because it can be changed into a prime (31205005229) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 486132 + ... + 546565.

It is an arithmetic number, because the mean of its divisors is an integer number (2212039116).

Almost surely, 2^31205005249 is an apocalyptic number.

It is an amenable number.

31205005249 is a deficient number, since it is larger than the sum of its proper divisors (4187620607).

31205005249 is a wasteful number, since it uses less digits than its factorization.

31205005249 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1032816.

The product of its (nonzero) digits is 10800, while the sum is 31.

The spelling of 31205005249 in words is "thirty-one billion, two hundred five million, five thousand, two hundred forty-nine".