51087995 has 16 divisors (see below), whose sum is σ = 72480960. Its totient is φ = 33823104.

The previous prime is 51087989. The next prime is 51087997. The reversal of 51087995 is 59978015.

It is a happy number.

It is not a de Polignac number, because 51087995 - 2¹² = 51083899 is a prime.

It is not an unprimeable number, because it can be changed into a prime (51087997) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 24152 + ... + 26181.

It is an arithmetic number, because the mean of its divisors is an integer number (4530060).

Almost surely, 2^51087995 is an apocalyptic number.

51087995 is a deficient number, since it is larger than the sum of its proper divisors (21392965).

51087995 is a wasteful number, since it uses less digits than its factorization.

51087995 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50374.

The product of its (nonzero) digits is 113400, while the sum is 44.

The square root of 51087995 is about 7147.5866556482. The cubic root of 51087995 is about 371.0561375663.

The spelling of 51087995 in words is "fifty-one million, eighty-seven thousand, nine hundred ninety-five".