30481257 has 4 divisors (see below), whose sum is σ = 40641680. Its totient is φ = 20320836.

The previous prime is 30481247. The next prime is 30481259. The reversal of 30481257 is 75218403.

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 not a de Polignac number, because 30481257 - 2⁶ = 30481193 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (30481259) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5080207 + ... + 5080212.

It is an arithmetic number, because the mean of its divisors is an integer number (10160420).

Almost surely, 2^30481257 is an apocalyptic number.

It is an amenable number.

30481257 is a deficient number, since it is larger than the sum of its proper divisors (10160423).

30481257 is a wasteful number, since it uses less digits than its factorization.

30481257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10160422.

The product of its (nonzero) digits is 6720, while the sum is 30.

The square root of 30481257 is about 5520.9833363270. The cubic root of 30481257 is about 312.3759746765.

The spelling of 30481257 in words is "thirty million, four hundred eighty-one thousand, two hundred fifty-seven".