51386277 has 4 divisors (see below), whose sum is σ = 68515040. Its totient is φ = 34257516.

The previous prime is 51386273. The next prime is 51386281. The reversal of 51386277 is 77268315.

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 an interprime number because it is at equal distance from previous prime (51386273) and next prime (51386281).

It is not a de Polignac number, because 51386277 - 2² = 51386273 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51386273) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 8564377 + ... + 8564382.

It is an arithmetic number, because the mean of its divisors is an integer number (17128760).

Almost surely, 2^51386277 is an apocalyptic number.

It is an amenable number.

51386277 is a deficient number, since it is larger than the sum of its proper divisors (17128763).

51386277 is a wasteful number, since it uses less digits than its factorization.

51386277 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17128762.

The product of its digits is 70560, while the sum is 39.

The square root of 51386277 is about 7168.4222113377. The cubic root of 51386277 is about 371.7768852285.

The spelling of 51386277 in words is "fifty-one million, three hundred eighty-six thousand, two hundred seventy-seven".