30638238231 has 4 divisors (see below), whose sum is σ = 40850984312. Its totient is φ = 20425492152.

The previous prime is 30638238209. The next prime is 30638238233. The reversal of 30638238231 is 13283283603.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13283283603 = 3 ⋅4427761201.

It is not a de Polignac number, because 30638238231 - 2¹⁰ = 30638237207 is a prime.

It is a super-2 number, since 2×30638238231² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 30638238231.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30638238233) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5106373036 + ... + 5106373041.

It is an arithmetic number, because the mean of its divisors is an integer number (10212746078).

Almost surely, 2^30638238231 is an apocalyptic number.

30638238231 is a deficient number, since it is larger than the sum of its proper divisors (10212746081).

30638238231 is a wasteful number, since it uses less digits than its factorization.

30638238231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10212746080.

The product of its (nonzero) digits is 124416, while the sum is 39.

The spelling of 30638238231 in words is "thirty billion, six hundred thirty-eight million, two hundred thirty-eight thousand, two hundred thirty-one".