51396277 has 4 divisors (see below), whose sum is σ = 51468480. Its totient is φ = 51324076.

The previous prime is 51396269. The next prime is 51396299. The reversal of 51396277 is 77269315.

51396277 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, and also an emirpimes, since its reverse is a distinct semiprime: 77269315 = 5 ⋅15453863.

It is a cyclic number.

It is not a de Polignac number, because 51396277 - 2³ = 51396269 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51396227) 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, 35023 + ... + 36460.

It is an arithmetic number, because the mean of its divisors is an integer number (12867120).

Almost surely, 2^51396277 is an apocalyptic number.

It is an amenable number.

51396277 is a deficient number, since it is larger than the sum of its proper divisors (72203).

51396277 is an equidigital number, since it uses as much as digits as its factorization.

51396277 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72202.

The product of its digits is 79380, while the sum is 40.

The square root of 51396277 is about 7169.1196809650. The cubic root of 51396277 is about 371.8010001475.

The spelling of 51396277 in words is "fifty-one million, three hundred ninety-six thousand, two hundred seventy-seven".