30523431 has 4 divisors (see below), whose sum is σ = 40697912. Its totient is φ = 20348952.

The previous prime is 30523429. The next prime is 30523433. The reversal of 30523431 is 13432503.

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

It is an interprime number because it is at equal distance from previous prime (30523429) and next prime (30523433).

It is not a de Polignac number, because 30523431 - 2¹ = 30523429 is a prime.

It is a super-2 number, since 2×30523431² = 1863359680023522, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 30523398 and 30523407.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30523433) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5087236 + ... + 5087241.

It is an arithmetic number, because the mean of its divisors is an integer number (10174478).

Almost surely, 2^30523431 is an apocalyptic number.

30523431 is a deficient number, since it is larger than the sum of its proper divisors (10174481).

30523431 is a wasteful number, since it uses less digits than its factorization.

30523431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10174480.

The product of its (nonzero) digits is 1080, while the sum is 21.

The square root of 30523431 is about 5524.8014443960. The cubic root of 30523431 is about 312.5199765363.

Adding to 30523431 its reverse (13432503), we get a palindrome (43955934).

The spelling of 30523431 in words is "thirty million, five hundred twenty-three thousand, four hundred thirty-one".