51499953 has 24 divisors (see below), whose sum is σ = 79043328. Its totient is φ = 32199552.

The previous prime is 51499951. The next prime is 51499957. The reversal of 51499953 is 35999415.

It is a happy number.

51499953 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 51499953 - 2¹ = 51499951 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 51499899 and 51499908.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51499951) 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 23 ways as a sum of consecutive naturals, for example, 70476 + ... + 71202.

It is an arithmetic number, because the mean of its divisors is an integer number (3293472).

Almost surely, 2^51499953 is an apocalyptic number.

It is an amenable number.

51499953 is a deficient number, since it is larger than the sum of its proper divisors (27543375).

51499953 is a wasteful number, since it uses less digits than its factorization.

51499953 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1213 (or 1210 counting only the distinct ones).

The product of its digits is 218700, while the sum is 45.

The square root of 51499953 is about 7176.3467725577. The cubic root of 51499953 is about 372.0508298563.

The spelling of 51499953 in words is "fifty-one million, four hundred ninety-nine thousand, nine hundred fifty-three".