30797087281 has 4 divisors (see below), whose sum is σ = 31018649200. Its totient is φ = 30575525364.

The previous prime is 30797087267. The next prime is 30797087291. The reversal of 30797087281 is 18278079703.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 30797087281 - 2⁵ = 30797087249 is a prime.

It is a super-2 number, since 2×30797087281² (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 (30797087221) 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, 110780751 + ... + 110781028.

It is an arithmetic number, because the mean of its divisors is an integer number (7754662300).

Almost surely, 2^30797087281 is an apocalyptic number.

It is an amenable number.

30797087281 is a deficient number, since it is larger than the sum of its proper divisors (221561919).

30797087281 is a wasteful number, since it uses less digits than its factorization.

30797087281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 221561918.

The product of its (nonzero) digits is 1185408, while the sum is 52.

The spelling of 30797087281 in words is "thirty billion, seven hundred ninety-seven million, eighty-seven thousand, two hundred eighty-one".