51797655 has 108 divisors (see below), whose sum is σ = 113906520. Its totient is φ = 21700224.

The previous prime is 51797639. The next prime is 51797659. The reversal of 51797655 is 55679715.

It is a happy number.

It is not a de Polignac number, because 51797655 - 2⁴ = 51797639 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 51797655.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51797659) by changing a digit.

It is a polite number, since it can be written in 107 ways as a sum of consecutive naturals, for example, 372576 + ... + 372714.

It is an arithmetic number, because the mean of its divisors is an integer number (1054690).

Almost surely, 2^51797655 is an apocalyptic number.

51797655 is an abundant number, since it is smaller than the sum of its proper divisors (62108865).

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

51797655 is a wasteful number, since it uses less digits than its factorization.

51797655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 190 (or 167 counting only the distinct ones).

The product of its digits is 330750, while the sum is 45.

The square root of 51797655 is about 7197.0587742494. The cubic root of 51797655 is about 372.7663485523.

The spelling of 51797655 in words is "fifty-one million, seven hundred ninety-seven thousand, six hundred fifty-five".