51141887 has 4 divisors (see below), whose sum is σ = 51354336. Its totient is φ = 50929440.

The previous prime is 51141859. The next prime is 51141889. The reversal of 51141887 is 78814115.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 51141887 - 2⁶ = 51141823 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51141889) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 105863 + ... + 106344.

It is an arithmetic number, because the mean of its divisors is an integer number (12838584).

Almost surely, 2^51141887 is an apocalyptic number.

51141887 is a deficient number, since it is larger than the sum of its proper divisors (212449).

51141887 is a wasteful number, since it uses less digits than its factorization.

51141887 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 212448.

The product of its digits is 8960, while the sum is 35.

The square root of 51141887 is about 7151.3556057576. The cubic root of 51141887 is about 371.1865656638.

The spelling of 51141887 in words is "fifty-one million, one hundred forty-one thousand, eight hundred eighty-seven".