51198145 has 8 divisors (see below), whose sum is σ = 61922304. Its totient is φ = 40635504.

The previous prime is 51198131. The next prime is 51198151. The reversal of 51198145 is 54189115.

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

It is a cyclic number.

It is not a de Polignac number, because 51198145 - 2²³ = 42809537 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 51198145.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 39679 + ... + 40948.

It is an arithmetic number, because the mean of its divisors is an integer number (7740288).

Almost surely, 2^51198145 is an apocalyptic number.

It is an amenable number.

51198145 is a deficient number, since it is larger than the sum of its proper divisors (10724159).

51198145 is a wasteful number, since it uses less digits than its factorization.

51198145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80759.

The product of its digits is 7200, while the sum is 34.

The square root of 51198145 is about 7155.2879047597. The cubic root of 51198145 is about 371.3226221832.

The spelling of 51198145 in words is "fifty-one million, one hundred ninety-eight thousand, one hundred forty-five".