51499641 has 4 divisors (see below), whose sum is σ = 68666192. Its totient is φ = 34333092.

The previous prime is 51499631. The next prime is 51499661. The reversal of 51499641 is 14699415.

51499641 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a de Polignac number, because none of the positive numbers 2^k-51499641 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 51499641.

It is not an unprimeable number, because it can be changed into a prime (51499601) 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 3 ways as a sum of consecutive naturals, for example, 8583271 + ... + 8583276.

It is an arithmetic number, because the mean of its divisors is an integer number (17166548).

Almost surely, 2^51499641 is an apocalyptic number.

It is an amenable number.

51499641 is a deficient number, since it is larger than the sum of its proper divisors (17166551).

51499641 is a wasteful number, since it uses less digits than its factorization.

51499641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17166550.

The product of its digits is 38880, while the sum is 39.

The square root of 51499641 is about 7176.3250344449. The cubic root of 51499641 is about 372.0500785281.

The spelling of 51499641 in words is "fifty-one million, four hundred ninety-nine thousand, six hundred forty-one".