51798777 has 4 divisors (see below), whose sum is σ = 69065040. Its totient is φ = 34532516.

The previous prime is 51798763. The next prime is 51798809. The reversal of 51798777 is 77789715.

It is a happy number.

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 cyclic number.

It is not a de Polignac number, because 51798777 - 2⁶ = 51798713 is a prime.

It is a super-2 number, since 2×51798777² = 5366226597391458, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (51798077) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8633127 + ... + 8633132.

It is an arithmetic number, because the mean of its divisors is an integer number (17266260).

Almost surely, 2^51798777 is an apocalyptic number.

It is an amenable number.

51798777 is a deficient number, since it is larger than the sum of its proper divisors (17266263).

51798777 is a wasteful number, since it uses less digits than its factorization.

51798777 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17266262.

The product of its digits is 864360, while the sum is 51.

The square root of 51798777 is about 7197.1367223362. The cubic root of 51798777 is about 372.7690400565.

The spelling of 51798777 in words is "fifty-one million, seven hundred ninety-eight thousand, seven hundred seventy-seven".