51025869 has 12 divisors (see below), whose sum is σ = 76434176. Its totient is φ = 34017084.

The previous prime is 51025867. The next prime is 51025873. The reversal of 51025869 is 96852015.

It is a happy number.

It is not a de Polignac number, because 51025869 - 2¹ = 51025867 is a prime.

It is a super-2 number, since 2×51025869² = 5207278614410322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51025867) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 104749 + ... + 105234.

Almost surely, 2^51025869 is an apocalyptic number.

It is an amenable number.

51025869 is a deficient number, since it is larger than the sum of its proper divisors (25408307).

51025869 is an equidigital number, since it uses as much as digits as its factorization.

51025869 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 209998 (or 209986 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 36.

The square root of 51025869 is about 7143.2393912006. The cubic root of 51025869 is about 370.9056678770.

The spelling of 51025869 in words is "fifty-one million, twenty-five thousand, eight hundred sixty-nine".