51720795 has 64 divisors (see below), whose sum is σ = 105984000. Its totient is φ = 23442048.

The previous prime is 51720751. The next prime is 51720811. The reversal of 51720795 is 59702715.

51720795 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 51720795 - 2⁹ = 51720283 is a prime.

It is a congruent number.

It is an unprimeable number.

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 63 ways as a sum of consecutive naturals, for example, 216286 + ... + 216524.

It is an arithmetic number, because the mean of its divisors is an integer number (1656000).

Almost surely, 2^51720795 is an apocalyptic number.

51720795 is an abundant number, since it is smaller than the sum of its proper divisors (54263205).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

51720795 is a wasteful number, since it uses less digits than its factorization.

51720795 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 489 (or 483 counting only the distinct ones).

The product of its (nonzero) digits is 22050, while the sum is 36.

The square root of 51720795 is about 7191.7171106767. The cubic root of 51720795 is about 372.5818807134.

It can be divided in two parts, 517 and 20795, that added together give a palindrome (21312).

The spelling of 51720795 in words is "fifty-one million, seven hundred twenty thousand, seven hundred ninety-five".