30520243 has 4 divisors (see below), whose sum is σ = 32867968. Its totient is φ = 28172520.

The previous prime is 30520229. The next prime is 30520247. The reversal of 30520243 is 34202503.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 34202503 = 149 ⋅229547.

It is a cyclic number.

It is not a de Polignac number, because 30520243 - 2¹³ = 30512051 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 30520243.

It is not an unprimeable number, because it can be changed into a prime (30520247) 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, 1173843 + ... + 1173868.

It is an arithmetic number, because the mean of its divisors is an integer number (8216992).

Almost surely, 2^30520243 is an apocalyptic number.

30520243 is a deficient number, since it is larger than the sum of its proper divisors (2347725).

30520243 is a wasteful number, since it uses less digits than its factorization.

30520243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2347724.

The product of its (nonzero) digits is 720, while the sum is 19.

The square root of 30520243 is about 5524.5129197061. The cubic root of 30520243 is about 312.5090958419.

Adding to 30520243 its reverse (34202503), we get a palindrome (64722746).

The spelling of 30520243 in words is "thirty million, five hundred twenty thousand, two hundred forty-three".