51779774 has 8 divisors (see below), whose sum is σ = 77711400. Its totient is φ = 25875976.

The previous prime is 51779743. The next prime is 51779797. The reversal of 51779774 is 47797715.

It is a happy number.

51779774 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×51779774² = 5362289990982152, which contains 22 as substring.

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 3 ways as a sum of consecutive naturals, for example, 1424 + ... + 10275.

It is an arithmetic number, because the mean of its divisors is an integer number (9713925).

Almost surely, 2^51779774 is an apocalyptic number.

51779774 is a deficient number, since it is larger than the sum of its proper divisors (25931626).

51779774 is a wasteful number, since it uses less digits than its factorization.

51779774 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13914.

The product of its digits is 432180, while the sum is 47.

The square root of 51779774 is about 7195.8164234505. The cubic root of 51779774 is about 372.7234495561.

The spelling of 51779774 in words is "fifty-one million, seven hundred seventy-nine thousand, seven hundred seventy-four".