51277265 has 32 divisors (see below), whose sum is σ = 69092352. Its totient is φ = 36288000.

The previous prime is 51277243. The next prime is 51277267. The reversal of 51277265 is 56277215.

It is a happy number.

It is not a de Polignac number, because 51277265 - 2⁶ = 51277201 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (51277267) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 189080 + ... + 189350.

It is an arithmetic number, because the mean of its divisors is an integer number (2159136).

Almost surely, 2^51277265 is an apocalyptic number.

It is an amenable number.

51277265 is a deficient number, since it is larger than the sum of its proper divisors (17815087).

51277265 is a wasteful number, since it uses less digits than its factorization.

51277265 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 401.

The product of its digits is 29400, while the sum is 35.

The square root of 51277265 is about 7160.8145486390. The cubic root of 51277265 is about 371.5138004965.

It can be divided in two parts, 512 and 77265, that added together give a palindrome (77777).

The spelling of 51277265 in words is "fifty-one million, two hundred seventy-seven thousand, two hundred sixty-five".