31730152457 has 4 divisors (see below), whose sum is σ = 31831527060. Its totient is φ = 31628777856.

The previous prime is 31730152451. The next prime is 31730152477. The reversal of 31730152457 is 75425103713.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 75425103713 = 234361 ⋅321833.

It can be written as a sum of positive squares in 2 ways, for example, as 3319027321 + 28411125136 = 57611^2 + 168556^2 .

It is a cyclic number.

It is not a de Polignac number, because 31730152457 - 2³² = 27435185161 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 31730152457.

It is not an unprimeable number, because it can be changed into a prime (31730152451) 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, 50686832 + ... + 50687457.

It is an arithmetic number, because the mean of its divisors is an integer number (7957881765).

Almost surely, 2^31730152457 is an apocalyptic number.

It is an amenable number.

31730152457 is a deficient number, since it is larger than the sum of its proper divisors (101374603).

31730152457 is a wasteful number, since it uses less digits than its factorization.

31730152457 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101374602.

The product of its (nonzero) digits is 88200, while the sum is 38.

The spelling of 31730152457 in words is "thirty-one billion, seven hundred thirty million, one hundred fifty-two thousand, four hundred fifty-seven".