25213661 has 8 divisors (see below), whose sum is σ = 27622848. Its totient is φ = 22824000.

The previous prime is 25213651. The next prime is 25213697. The reversal of 25213661 is 16631252.

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

It is a cyclic number.

It is not a de Polignac number, because 25213661 - 2⁶ = 25213597 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 25213661.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25213621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2105 + ... + 7406.

It is an arithmetic number, because the mean of its divisors is an integer number (3452856).

Almost surely, 2^25213661 is an apocalyptic number.

It is an amenable number.

25213661 is a deficient number, since it is larger than the sum of its proper divisors (2409187).

25213661 is a wasteful number, since it uses less digits than its factorization.

25213661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9763.

The product of its digits is 2160, while the sum is 26.

The square root of 25213661 is about 5021.3206430181. The cubic root of 25213661 is about 293.2324100408.

The spelling of 25213661 in words is "twenty-five million, two hundred thirteen thousand, six hundred sixty-one".