51779854 has 16 divisors (see below), whose sum is σ = 92625408. Its totient is φ = 21226392.

The previous prime is 51779821. The next prime is 51779879. The reversal of 51779854 is 45897715.

It is a happy number.

It is a super-2 number, since 2×51779854² = 5362306560522632, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (46).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 80082 + ... + 80725.

It is an arithmetic number, because the mean of its divisors is an integer number (5789088).

Almost surely, 2^51779854 is an apocalyptic number.

51779854 is a deficient number, since it is larger than the sum of its proper divisors (40845554).

51779854 is a wasteful number, since it uses less digits than its factorization.

51779854 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 160839.

The product of its digits is 352800, while the sum is 46.

The square root of 51779854 is about 7195.8219822339. The cubic root of 51779854 is about 372.7236415092.

The spelling of 51779854 in words is "fifty-one million, seven hundred seventy-nine thousand, eight hundred fifty-four".