52278537 has 4 divisors (see below), whose sum is σ = 69704720. Its totient is φ = 34852356.

The previous prime is 52278469. The next prime is 52278547. The reversal of 52278537 is 73587225.

52278537 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 not a de Polignac number, because 52278537 - 2¹² = 52274441 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 52278495 and 52278504.

It is not an unprimeable number, because it can be changed into a prime (52278547) 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, 8713087 + ... + 8713092.

It is an arithmetic number, because the mean of its divisors is an integer number (17426180).

Almost surely, 2^52278537 is an apocalyptic number.

It is an amenable number.

52278537 is a deficient number, since it is larger than the sum of its proper divisors (17426183).

52278537 is a wasteful number, since it uses less digits than its factorization.

52278537 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17426182.

The product of its digits is 117600, while the sum is 39.

The square root of 52278537 is about 7230.3898235157. The cubic root of 52278537 is about 373.9163667647.

The spelling of 52278537 in words is "fifty-two million, two hundred seventy-eight thousand, five hundred thirty-seven".