51899193 has 12 divisors (see below), whose sum is σ = 75808980. Its totient is φ = 34210176.

The previous prime is 51899189. The next prime is 51899209. The reversal of 51899193 is 39199815.

It can be written as a sum of positive squares in 2 ways, for example, as 31945104 + 19954089 = 5652^2 + 4467^2 .

It is not a de Polignac number, because 51899193 - 2² = 51899189 is a prime.

It is not an unprimeable number, because it can be changed into a prime (51899143) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 31596 + ... + 33197.

It is an arithmetic number, because the mean of its divisors is an integer number (6317415).

Almost surely, 2^51899193 is an apocalyptic number.

It is an amenable number.

51899193 is a deficient number, since it is larger than the sum of its proper divisors (23909787).

51899193 is a wasteful number, since it uses less digits than its factorization.

51899193 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64888 (or 64885 counting only the distinct ones).

The product of its digits is 87480, while the sum is 45.

The square root of 51899193 is about 7204.1094522502. The cubic root of 51899193 is about 373.0097652617.

The spelling of 51899193 in words is "fifty-one million, eight hundred ninety-nine thousand, one hundred ninety-three".