30225251 has 4 divisors (see below), whose sum is σ = 34543152. Its totient is φ = 25907352.

The previous prime is 30225233. The next prime is 30225271. The reversal of 30225251 is 15252203.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 30225251 - 2¹⁸ = 29963107 is a prime.

It is not an unprimeable number, because it can be changed into a prime (30225271) 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, 2158940 + ... + 2158953.

It is an arithmetic number, because the mean of its divisors is an integer number (8635788).

Almost surely, 2^30225251 is an apocalyptic number.

30225251 is a deficient number, since it is larger than the sum of its proper divisors (4317901).

30225251 is an equidigital number, since it uses as much as digits as its factorization.

30225251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4317900.

The product of its (nonzero) digits is 600, while the sum is 20.

The square root of 30225251 is about 5497.7496305307. The cubic root of 30225251 is about 311.4989870173.

Adding to 30225251 its reverse (15252203), we get a palindrome (45477454).

The spelling of 30225251 in words is "thirty million, two hundred twenty-five thousand, two hundred fifty-one".