31297245705 has 48 divisors (see below), whose sum is σ = 59195650176. Its totient is φ = 15170472960.

The previous prime is 31297245697. The next prime is 31297245731. The reversal of 31297245705 is 50754279213.

It is a happy number.

31297245705 is a `hidden beast` number, since 3 + 1 + 2 + 9 + 72 + 4 + 570 + 5 = 666.

It is not a de Polignac number, because 31297245705 - 2³ = 31297245697 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 3020764 + ... + 3031106.

It is an arithmetic number, because the mean of its divisors is an integer number (1233242712).

Almost surely, 2^31297245705 is an apocalyptic number.

It is an amenable number.

31297245705 is a deficient number, since it is larger than the sum of its proper divisors (27898404471).

31297245705 is a wasteful number, since it uses less digits than its factorization.

31297245705 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16478 (or 16475 counting only the distinct ones).

The product of its (nonzero) digits is 529200, while the sum is 45.

The spelling of 31297245705 in words is "thirty-one billion, two hundred ninety-seven million, two hundred forty-five thousand, seven hundred five".