30040043231 has 4 divisors (see below), whose sum is σ = 32770956264. Its totient is φ = 27309130200.

The previous prime is 30040043219. The next prime is 30040043249. The reversal of 30040043231 is 13234004003.

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

It is not a de Polignac number, because 30040043231 - 2⁶ = 30040043167 is a prime.

It is a super-2 number, since 2×30040043231² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30040043431) 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, 1365456500 + ... + 1365456521.

It is an arithmetic number, because the mean of its divisors is an integer number (8192739066).

Almost surely, 2^30040043231 is an apocalyptic number.

30040043231 is a deficient number, since it is larger than the sum of its proper divisors (2730913033).

30040043231 is a wasteful number, since it uses less digits than its factorization.

30040043231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2730913032.

The product of its (nonzero) digits is 864, while the sum is 20.

Adding to 30040043231 its reverse (13234004003), we get a palindrome (43274047234).

The spelling of 30040043231 in words is "thirty billion, forty million, forty-three thousand, two hundred thirty-one".