25303213 has 4 divisors (see below), whose sum is σ = 27249628. Its totient is φ = 23356800.

The previous prime is 25303211. The next prime is 25303237. The reversal of 25303213 is 31230352.

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

It can be written as a sum of positive squares in 2 ways, for example, as 6666724 + 18636489 = 2582^2 + 4317^2 .

It is a cyclic number.

It is not a de Polignac number, because 25303213 - 2¹ = 25303211 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25303211) 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, 973188 + ... + 973213.

It is an arithmetic number, because the mean of its divisors is an integer number (6812407).

Almost surely, 2^25303213 is an apocalyptic number.

It is an amenable number.

25303213 is a deficient number, since it is larger than the sum of its proper divisors (1946415).

25303213 is a wasteful number, since it uses less digits than its factorization.

25303213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1946414.

The product of its (nonzero) digits is 540, while the sum is 19.

The square root of 25303213 is about 5030.2299152226. The cubic root of 25303213 is about 293.5791601759.

Adding to 25303213 its reverse (31230352), we get a palindrome (56533565).

The spelling of 25303213 in words is "twenty-five million, three hundred three thousand, two hundred thirteen".