30240253 has 4 divisors (see below), whose sum is σ = 30310848. Its totient is φ = 30169660.

The previous prime is 30240251. The next prime is 30240257. The reversal of 30240253 is 35204203.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 35204203 = 233 ⋅151091.

It is a cyclic number.

It is not a de Polignac number, because 30240253 - 2¹ = 30240251 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 30240253.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30240251) 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, 34651 + ... + 35512.

It is an arithmetic number, because the mean of its divisors is an integer number (7577712).

Almost surely, 2^30240253 is an apocalyptic number.

It is an amenable number.

30240253 is a deficient number, since it is larger than the sum of its proper divisors (70595).

30240253 is an equidigital number, since it uses as much as digits as its factorization.

30240253 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70594.

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

The square root of 30240253 is about 5499.1138377015. The cubic root of 30240253 is about 311.5505149585.

Adding to 30240253 its reverse (35204203), we get a palindrome (65444456).

The spelling of 30240253 in words is "thirty million, two hundred forty thousand, two hundred fifty-three".