51407889 has 32 divisors (see below), whose sum is σ = 77134848. Its totient is φ = 30240000.

The previous prime is 51407879. The next prime is 51407903. The reversal of 51407889 is 98870415.

It is not a de Polignac number, because 51407889 - 2⁵ = 51407857 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 51407889.

It is not an unprimeable number, because it can be changed into a prime (51407819) 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, 121899 + ... + 122319.

It is an arithmetic number, because the mean of its divisors is an integer number (2410464).

Almost surely, 2^51407889 is an apocalyptic number.

It is an amenable number.

51407889 is a deficient number, since it is larger than the sum of its proper divisors (25726959).

51407889 is a wasteful number, since it uses less digits than its factorization.

51407889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 569.

The product of its (nonzero) digits is 80640, while the sum is 42.

The square root of 51407889 is about 7169.9294975613. The cubic root of 51407889 is about 371.8289984667.

The spelling of 51407889 in words is "fifty-one million, four hundred seven thousand, eight hundred eighty-nine".