51812977 has 4 divisors (see below), whose sum is σ = 52041456. Its totient is φ = 51584500.

The previous prime is 51812963. The next prime is 51812993. The reversal of 51812977 is 77921815.

51812977 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 a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51812977 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51812927) by changing a digit.

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, 113899 + ... + 114352.

It is an arithmetic number, because the mean of its divisors is an integer number (13010364).

Almost surely, 2^51812977 is an apocalyptic number.

It is an amenable number.

51812977 is a deficient number, since it is larger than the sum of its proper divisors (228479).

51812977 is a wasteful number, since it uses less digits than its factorization.

51812977 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 228478.

The product of its digits is 35280, while the sum is 40.

The square root of 51812977 is about 7198.1231581573. The cubic root of 51812977 is about 372.8031002992.

The spelling of 51812977 in words is "fifty-one million, eight hundred twelve thousand, nine hundred seventy-seven".