25211530 has 8 divisors (see below), whose sum is σ = 45380772. Its totient is φ = 10084608.

The previous prime is 25211521. The next prime is 25211539. The reversal of 25211530 is 3511252.

It is an interprime number because it is at equal distance from previous prime (25211521) and next prime (25211539).

It can be written as a sum of positive squares in 2 ways, for example, as 25210441 + 1089 = 5021^2 + 33^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 25211498 and 25211507.

It is not an unprimeable number, because it can be changed into a prime (25211539) 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, 1260567 + ... + 1260586.

Almost surely, 2^25211530 is an apocalyptic number.

25211530 is a deficient number, since it is larger than the sum of its proper divisors (20169242).

25211530 is a wasteful number, since it uses less digits than its factorization.

25211530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2521160.

The product of its (nonzero) digits is 300, while the sum is 19.

The square root of 25211530 is about 5021.1084433619. The cubic root of 25211530 is about 293.2241487008.

Adding to 25211530 its reverse (3511252), we get a palindrome (28722782).

The spelling of 25211530 in words is "twenty-five million, two hundred eleven thousand, five hundred thirty".