51380198 has 8 divisors (see below), whose sum is σ = 79153392. Its totient is φ = 24995736.

The previous prime is 51380179. The next prime is 51380233. The reversal of 51380198 is 89108315.

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 pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 347090 + ... + 347237.

It is an arithmetic number, because the mean of its divisors is an integer number (9894174).

Almost surely, 2^51380198 is an apocalyptic number.

51380198 is a deficient number, since it is larger than the sum of its proper divisors (27773194).

51380198 is a wasteful number, since it uses less digits than its factorization.

51380198 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 694366.

The product of its (nonzero) digits is 8640, while the sum is 35.

The square root of 51380198 is about 7167.9981863837. The cubic root of 51380198 is about 371.7622242403.

The spelling of 51380198 in words is "fifty-one million, three hundred eighty thousand, one hundred ninety-eight".