51799918 has 8 divisors (see below), whose sum is σ = 82270512. Its totient is φ = 24376416.

The previous prime is 51799903. The next prime is 51799939. The reversal of 51799918 is 81999715.

It is a happy number.

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, 761730 + ... + 761797.

It is an arithmetic number, because the mean of its divisors is an integer number (10283814).

Almost surely, 2^51799918 is an apocalyptic number.

51799918 is a deficient number, since it is larger than the sum of its proper divisors (30470594).

51799918 is a wasteful number, since it uses less digits than its factorization.

51799918 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1523546.

The product of its digits is 204120, while the sum is 49.

The square root of 51799918 is about 7197.2159895337. The cubic root of 51799918 is about 372.7717770989.

The spelling of 51799918 in words is "fifty-one million, seven hundred ninety-nine thousand, nine hundred eighteen".