30973218253 has 8 divisors (see below), whose sum is σ = 31405563000. Its totient is φ = 30541091328.

The previous prime is 30973218251. The next prime is 30973218257. The reversal of 30973218253 is 35281237903.

It can be written as a sum of positive squares in 4 ways, for example, as 52809289 + 30920408964 = 7267^2 + 175842^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 30973218253 - 2¹ = 30973218251 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30973218251) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 243183 + ... + 347971.

It is an arithmetic number, because the mean of its divisors is an integer number (3925695375).

Almost surely, 2^30973218253 is an apocalyptic number.

It is an amenable number.

30973218253 is a deficient number, since it is larger than the sum of its proper divisors (432344747).

30973218253 is a wasteful number, since it uses less digits than its factorization.

30973218253 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 108911.

The product of its (nonzero) digits is 272160, while the sum is 43.

The spelling of 30973218253 in words is "thirty billion, nine hundred seventy-three million, two hundred eighteen thousand, two hundred fifty-three".