51498187 has 6 divisors (see below), whose sum is σ = 55764492. Its totient is φ = 47536632.

The previous prime is 51498131. The next prime is 51498193. The reversal of 51498187 is 78189415.

It is a happy number.

51498187 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 51498187 - 2²³ = 43109579 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51498197) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 152193 + ... + 152530.

It is an arithmetic number, because the mean of its divisors is an integer number (9294082).

Almost surely, 2^51498187 is an apocalyptic number.

51498187 is a deficient number, since it is larger than the sum of its proper divisors (4266305).

51498187 is a wasteful number, since it uses less digits than its factorization.

51498187 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 304749 (or 304736 counting only the distinct ones).

The product of its digits is 80640, while the sum is 43.

The square root of 51498187 is about 7176.2237283964. The cubic root of 51498187 is about 372.0465771063.

The spelling of 51498187 in words is "fifty-one million, four hundred ninety-eight thousand, one hundred eighty-seven".