52278765 has 32 divisors (see below), whose sum is σ = 104288256. Its totient is φ = 21725760.

The previous prime is 52278761. The next prime is 52278797. The reversal of 52278765 is 56787225.

It is not a de Polignac number, because 52278765 - 2² = 52278761 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (52278761) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 21477 + ... + 23786.

It is an arithmetic number, because the mean of its divisors is an integer number (3259008).

Almost surely, 2^52278765 is an apocalyptic number.

52278765 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

It is an amenable number.

52278765 is a deficient number, since it is larger than the sum of its proper divisors (52009491).

52278765 is a wasteful number, since it uses less digits than its factorization.

52278765 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45289.

The product of its digits is 235200, while the sum is 42.

The square root of 52278765 is about 7230.4055902833. The cubic root of 52278765 is about 373.9169103454.

The spelling of 52278765 in words is "fifty-two million, two hundred seventy-eight thousand, seven hundred sixty-five".