25335561 has 8 divisors (see below), whose sum is σ = 33996544. Its totient is φ = 16782480.

The previous prime is 25335553. The next prime is 25335601. The reversal of 25335561 is 16553352.

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

It is not a de Polignac number, because 25335561 - 2³ = 25335553 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25335521) 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, 26425 + ... + 27366.

It is an arithmetic number, because the mean of its divisors is an integer number (4249568).

Almost surely, 2^25335561 is an apocalyptic number.

It is an amenable number.

25335561 is a deficient number, since it is larger than the sum of its proper divisors (8660983).

25335561 is a wasteful number, since it uses less digits than its factorization.

25335561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53951.

The product of its digits is 13500, while the sum is 30.

The square root of 25335561 is about 5033.4442482261. Note that the first 3 decimals coincide. The cubic root of 25335561 is about 293.7042122084.

The spelling of 25335561 in words is "twenty-five million, three hundred thirty-five thousand, five hundred sixty-one".