30320253 has 12 divisors (see below), whose sum is σ = 44289180. Its totient is φ = 19985856.

The previous prime is 30320243. The next prime is 30320261. The reversal of 30320253 is 35202303.

It can be written as a sum of positive squares in 2 ways, for example, as 1996569 + 28323684 = 1413^2 + 5322^2 .

It is not a de Polignac number, because 30320253 - 2¹⁰ = 30319229 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30320243) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 18126 + ... + 19727.

It is an arithmetic number, because the mean of its divisors is an integer number (3690765).

Almost surely, 2^30320253 is an apocalyptic number.

It is an amenable number.

30320253 is a deficient number, since it is larger than the sum of its proper divisors (13968927).

30320253 is a wasteful number, since it uses less digits than its factorization.

30320253 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37948 (or 37945 counting only the distinct ones).

The product of its (nonzero) digits is 540, while the sum is 18.

The square root of 30320253 is about 5506.3829325611. The cubic root of 30320253 is about 311.8250066518.

Adding to 30320253 its reverse (35202303), we get a palindrome (65522556).

The spelling of 30320253 in words is "thirty million, three hundred twenty thousand, two hundred fifty-three".