51659998 has 8 divisors (see below), whose sum is σ = 83450808. Its totient is φ = 23843064.

The previous prime is 51659989. The next prime is 51660017. The reversal of 51659998 is 89995615.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 993436 + ... + 993487.

It is an arithmetic number, because the mean of its divisors is an integer number (10431351).

Almost surely, 2^51659998 is an apocalyptic number.

51659998 is a deficient number, since it is larger than the sum of its proper divisors (31790810).

51659998 is a wasteful number, since it uses less digits than its factorization.

51659998 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1986938.

The product of its digits is 874800, while the sum is 52.

The square root of 51659998 is about 7187.4889912959. The cubic root of 51659998 is about 372.4358353814.

The spelling of 51659998 in words is "fifty-one million, six hundred fifty-nine thousand, nine hundred ninety-eight".