30520413 has 24 divisors (see below), whose sum is σ = 54964416. Its totient is φ = 15854400.

The previous prime is 30520393. The next prime is 30520429. The reversal of 30520413 is 31402503.

It is not a de Polignac number, because 30520413 - 2⁵ = 30520381 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30520493) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 21328 + ... + 22713.

It is an arithmetic number, because the mean of its divisors is an integer number (2290184).

Almost surely, 2^30520413 is an apocalyptic number.

30520413 is a gapful number since it is divisible by the number (33) formed by its first and last digit.

It is an amenable number.

30520413 is a deficient number, since it is larger than the sum of its proper divisors (24444003).

30520413 is a wasteful number, since it uses less digits than its factorization.

30520413 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44065 (or 44062 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 18.

The square root of 30520413 is about 5524.5283056565. The cubic root of 30520413 is about 312.5096760737.

Adding to 30520413 its reverse (31402503), we get a palindrome (61922916).

The spelling of 30520413 in words is "thirty million, five hundred twenty thousand, four hundred thirteen".