25500161 has 8 divisors (see below), whose sum is σ = 26246880. Its totient is φ = 24760512.

The previous prime is 25500151. The next prime is 25500229. The reversal of 25500161 is 16100552.

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 25500161 - 2²² = 21305857 is a prime.

It is a super-2 number, since 2×25500161² = 1300516422051842, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25500131) 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, 6041 + ... + 9353.

It is an arithmetic number, because the mean of its divisors is an integer number (3280860).

Almost surely, 2^25500161 is an apocalyptic number.

It is an amenable number.

25500161 is a deficient number, since it is larger than the sum of its proper divisors (746719).

25500161 is a wasteful number, since it uses less digits than its factorization.

25500161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3535.

The product of its (nonzero) digits is 300, while the sum is 20.

The square root of 25500161 is about 5049.7684105313. The cubic root of 25500161 is about 294.3388852999.

The spelling of 25500161 in words is "twenty-five million, five hundred thousand, one hundred sixty-one".