51398558 has 16 divisors (see below), whose sum is σ = 80939520. Its totient is φ = 24447000.

The previous prime is 51398549. The next prime is 51398561. The reversal of 51398558 is 85589315.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3368 + ... + 10683.

It is an arithmetic number, because the mean of its divisors is an integer number (5058720).

Almost surely, 2^51398558 is an apocalyptic number.

51398558 is a deficient number, since it is larger than the sum of its proper divisors (29540962).

51398558 is a wasteful number, since it uses less digits than its factorization.

51398558 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14143.

The product of its digits is 216000, while the sum is 44.

The square root of 51398558 is about 7169.2787642831. The cubic root of 51398558 is about 371.8065003224.

The spelling of 51398558 in words is "fifty-one million, three hundred ninety-eight thousand, five hundred fifty-eight".