25530513 has 8 divisors (see below), whose sum is σ = 34598976. Its totient is φ = 16741200.

The previous prime is 25530511. The next prime is 25530517. The reversal of 25530513 is 31503552.

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

It is not a de Polignac number, because 25530513 - 2¹ = 25530511 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (25530511) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 69573 + ... + 69938.

It is an arithmetic number, because the mean of its divisors is an integer number (4324872).

Almost surely, 2^25530513 is an apocalyptic number.

It is an amenable number.

25530513 is a deficient number, since it is larger than the sum of its proper divisors (9068463).

25530513 is a wasteful number, since it uses less digits than its factorization.

25530513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 139575.

The product of its (nonzero) digits is 2250, while the sum is 24.

The square root of 25530513 is about 5052.7728031250. The cubic root of 25530513 is about 294.4556196173.

The spelling of 25530513 in words is "twenty-five million, five hundred thirty thousand, five hundred thirteen".