30180997331 has 4 divisors (see below), whose sum is σ = 30186263832. Its totient is φ = 30175730832.

The previous prime is 30180997309. The next prime is 30180997397. The reversal of 30180997331 is 13379908103.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-30180997331 is a prime.

It is a super-2 number, since 2×30180997331² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (30180997631) 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, 2624645 + ... + 2636118.

It is an arithmetic number, because the mean of its divisors is an integer number (7546565958).

Almost surely, 2^30180997331 is an apocalyptic number.

30180997331 is a deficient number, since it is larger than the sum of its proper divisors (5266501).

30180997331 is an equidigital number, since it uses as much as digits as its factorization.

30180997331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5266500.

The product of its (nonzero) digits is 122472, while the sum is 44.

The spelling of 30180997331 in words is "thirty billion, one hundred eighty million, nine hundred ninety-seven thousand, three hundred thirty-one".