30242791 has 4 divisors (see below), whose sum is σ = 30473784. Its totient is φ = 30011800.

The previous prime is 30242783. The next prime is 30242809. The reversal of 30242791 is 19724203.

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 30242791 - 2³ = 30242783 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 (30242731) 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, 115300 + ... + 115561.

It is an arithmetic number, because the mean of its divisors is an integer number (7618446).

Almost surely, 2^30242791 is an apocalyptic number.

30242791 is a deficient number, since it is larger than the sum of its proper divisors (230993).

30242791 is a wasteful number, since it uses less digits than its factorization.

30242791 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 230992.

The product of its (nonzero) digits is 3024, while the sum is 28.

The square root of 30242791 is about 5499.3445973134. The cubic root of 30242791 is about 311.5592306383.

Adding to 30242791 its reverse (19724203), we get a palindrome (49966994).

The spelling of 30242791 in words is "thirty million, two hundred forty-two thousand, seven hundred ninety-one".