30505263 has 16 divisors (see below), whose sum is σ = 41718240. Its totient is φ = 19819904.

The previous prime is 30505249. The next prime is 30505309. The reversal of 30505263 is 36250503.

It is a cyclic number.

It is not a de Polignac number, because 30505263 - 2⁴ = 30505247 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30505213) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26953 + ... + 28061.

It is an arithmetic number, because the mean of its divisors is an integer number (2607390).

Almost surely, 2^30505263 is an apocalyptic number.

30505263 is a deficient number, since it is larger than the sum of its proper divisors (11212977).

30505263 is a wasteful number, since it uses less digits than its factorization.

30505263 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1338.

The product of its (nonzero) digits is 2700, while the sum is 24.

The square root of 30505263 is about 5523.1569776714. The cubic root of 30505263 is about 312.4579587177.

Adding to 30505263 its reverse (36250503), we get a palindrome (66755766).

The spelling of 30505263 in words is "thirty million, five hundred five thousand, two hundred sixty-three".