51340887 has 24 divisors (see below), whose sum is σ = 80471664. Its totient is φ = 31353984.

The previous prime is 51340879. The next prime is 51340909. The reversal of 51340887 is 78804315.

It is not a de Polignac number, because 51340887 - 2³ = 51340879 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51340837) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 14428 + ... + 17630.

It is an arithmetic number, because the mean of its divisors is an integer number (3352986).

Almost surely, 2^51340887 is an apocalyptic number.

51340887 is a deficient number, since it is larger than the sum of its proper divisors (29130777).

51340887 is a wasteful number, since it uses less digits than its factorization.

51340887 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3359 (or 3356 counting only the distinct ones).

The product of its (nonzero) digits is 26880, while the sum is 36.

The square root of 51340887 is about 7165.2555432448. The cubic root of 51340887 is about 371.6673882652.

The spelling of 51340887 in words is "fifty-one million, three hundred forty thousand, eight hundred eighty-seven".