31148753217 has 24 divisors (see below), whose sum is σ = 44136176736. Its totient is φ = 19536450048.

The previous prime is 31148753213. The next prime is 31148753227. The reversal of 31148753217 is 71235784113.

It is not a de Polignac number, because 31148753217 - 2² = 31148753213 is a prime.

It is not an unprimeable number, because it can be changed into a prime (31148753213) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2757493 + ... + 2768765.

It is an arithmetic number, because the mean of its divisors is an integer number (1839007364).

Almost surely, 2^31148753217 is an apocalyptic number.

It is an amenable number.

31148753217 is a deficient number, since it is larger than the sum of its proper divisors (12987423519).

31148753217 is a wasteful number, since it uses less digits than its factorization.

31148753217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14497 (or 14480 counting only the distinct ones).

The product of its digits is 141120, while the sum is 42.

The spelling of 31148753217 in words is "thirty-one billion, one hundred forty-eight million, seven hundred fifty-three thousand, two hundred seventeen".