51977782 has 4 divisors (see below), whose sum is σ = 77966676. Its totient is φ = 25988890.

The previous prime is 51977771. The next prime is 51977797. The reversal of 51977782 is 28777915.

51977782 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 28777915 = 5 ⋅5755583.

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 as a sum of consecutive naturals, namely, 12994444 + ... + 12994447.

It is an arithmetic number, because the mean of its divisors is an integer number (19491669).

Almost surely, 2^51977782 is an apocalyptic number.

51977782 is a deficient number, since it is larger than the sum of its proper divisors (25988894).

51977782 is a wasteful number, since it uses less digits than its factorization.

51977782 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25988893.

The product of its digits is 246960, while the sum is 46.

The square root of 51977782 is about 7209.5618452164. The cubic root of 51977782 is about 373.1979485364.

The spelling of 51977782 in words is "fifty-one million, nine hundred seventy-seven thousand, seven hundred eighty-two".