30531413 has 4 divisors (see below), whose sum is σ = 33307008. Its totient is φ = 27755820.

The previous prime is 30531353. The next prime is 30531421. The reversal of 30531413 is 31413503.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 30531413 - 2²² = 26337109 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30531433) 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, 1387781 + ... + 1387802.

It is an arithmetic number, because the mean of its divisors is an integer number (8326752).

Almost surely, 2^30531413 is an apocalyptic number.

It is an amenable number.

30531413 is a deficient number, since it is larger than the sum of its proper divisors (2775595).

30531413 is a wasteful number, since it uses less digits than its factorization.

30531413 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2775594.

The product of its (nonzero) digits is 540, while the sum is 20.

The square root of 30531413 is about 5525.5237760777. The cubic root of 30531413 is about 312.5472159057.

Adding to 30531413 its reverse (31413503), we get a palindrome (61944916).

The spelling of 30531413 in words is "thirty million, five hundred thirty-one thousand, four hundred thirteen".