51277887 has 32 divisors (see below), whose sum is σ = 80467200. Its totient is φ = 32217696.

The previous prime is 51277883. The next prime is 51277957. The reversal of 51277887 is 78877215.

It is not a de Polignac number, because 51277887 - 2² = 51277883 is a prime.

It is a zygodrome in base 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51277883) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 32908 + ... + 34430.

It is an arithmetic number, because the mean of its divisors is an integer number (2514600).

Almost surely, 2^51277887 is an apocalyptic number.

51277887 is a deficient number, since it is larger than the sum of its proper divisors (29189313).

51277887 is a wasteful number, since it uses less digits than its factorization.

51277887 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1604 (or 1598 counting only the distinct ones).

The product of its digits is 219520, while the sum is 45.

The square root of 51277887 is about 7160.8579793206. The cubic root of 51277887 is about 371.5153026610.

The spelling of 51277887 in words is "fifty-one million, two hundred seventy-seven thousand, eight hundred eighty-seven".