30140243 has 6 divisors (see below), whose sum is σ = 35061156. Its totient is φ = 25834452.

The previous prime is 30140239. The next prime is 30140321. The reversal of 30140243 is 34204103.

It is not a de Polignac number, because 30140243 - 2² = 30140239 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (30140543) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 307505 + ... + 307602.

It is an arithmetic number, because the mean of its divisors is an integer number (5843526).

Almost surely, 2^30140243 is an apocalyptic number.

30140243 is a deficient number, since it is larger than the sum of its proper divisors (4920913).

30140243 is an equidigital number, since it uses as much as digits as its factorization.

30140243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 615121 (or 615114 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 17.

The square root of 30140243 is about 5490.0130236640. The cubic root of 30140243 is about 311.2066842944.

Adding to 30140243 its reverse (34204103), we get a palindrome (64344346).

The spelling of 30140243 in words is "thirty million, one hundred forty thousand, two hundred forty-three".