51900199 has 4 divisors (see below), whose sum is σ = 55892536. Its totient is φ = 47907864.

The previous prime is 51900181. The next prime is 51900217. The reversal of 51900199 is 99100915.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (51900181) and next prime (51900217).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51900199 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51900179) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1996149 + ... + 1996174.

It is an arithmetic number, because the mean of its divisors is an integer number (13973134).

Almost surely, 2^51900199 is an apocalyptic number.

51900199 is a deficient number, since it is larger than the sum of its proper divisors (3992337).

51900199 is a wasteful number, since it uses less digits than its factorization.

51900199 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3992336.

The product of its (nonzero) digits is 3645, while the sum is 34.

The square root of 51900199 is about 7204.1792731719. The cubic root of 51900199 is about 373.0121753531.

The spelling of 51900199 in words is "fifty-one million, nine hundred thousand, one hundred ninety-nine".