30287181421 has 4 divisors (see below), whose sum is σ = 34613921632. Its totient is φ = 25960441212.

The previous prime is 30287181391. The next prime is 30287181433. The reversal of 30287181421 is 12418178203.

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 a de Polignac number, because none of the positive numbers 2^k-30287181421 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 (30287181461) 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, 2163370095 + ... + 2163370108.

It is an arithmetic number, because the mean of its divisors is an integer number (8653480408).

Almost surely, 2^30287181421 is an apocalyptic number.

It is an amenable number.

30287181421 is a deficient number, since it is larger than the sum of its proper divisors (4326740211).

30287181421 is an equidigital number, since it uses as much as digits as its factorization.

30287181421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4326740210.

The product of its (nonzero) digits is 21504, while the sum is 37.

The spelling of 30287181421 in words is "thirty billion, two hundred eighty-seven million, one hundred eighty-one thousand, four hundred twenty-one".