30440444431 has 4 divisors (see below), whose sum is σ = 30608623864. Its totient is φ = 30272265000.

The previous prime is 30440444423. The next prime is 30440444449. The reversal of 30440444431 is 13444404403.

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

It is a cyclic number.

It is not a de Polignac number, because 30440444431 - 2³ = 30440444423 is a prime.

It is a super-2 number, since 2×30440444431² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 30440444393 and 30440444402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30440444401) 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, 84089445 + ... + 84089806.

It is an arithmetic number, because the mean of its divisors is an integer number (7652155966).

Almost surely, 2^30440444431 is an apocalyptic number.

30440444431 is a deficient number, since it is larger than the sum of its proper divisors (168179433).

30440444431 is a wasteful number, since it uses less digits than its factorization.

30440444431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 168179432.

The product of its (nonzero) digits is 36864, while the sum is 31.

Adding to 30440444431 its reverse (13444404403), we get a palindrome (43884848834).

The spelling of 30440444431 in words is "thirty billion, four hundred forty million, four hundred forty-four thousand, four hundred thirty-one".