25100228161 has 8 divisors (see below), whose sum is σ = 25972165800. Its totient is φ = 24228718080.

The previous prime is 25100228147. The next prime is 25100228203. The reversal of 25100228161 is 16182200152.

It can be written as a sum of positive squares in 4 ways, for example, as 6553873936 + 18546354225 = 80956^2 + 136185^2 .

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 25100228161 - 2²⁵ = 25066673729 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25100226161) 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, 14931 + ... + 224551.

It is an arithmetic number, because the mean of its divisors is an integer number (3246520725).

Almost surely, 2^25100228161 is an apocalyptic number.

It is an amenable number.

25100228161 is a deficient number, since it is larger than the sum of its proper divisors (871937639).

25100228161 is a wasteful number, since it uses less digits than its factorization.

25100228161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 213779.

The product of its (nonzero) digits is 1920, while the sum is 28.

The spelling of 25100228161 in words is "twenty-five billion, one hundred million, two hundred twenty-eight thousand, one hundred sixty-one".