52181555 has 4 divisors (see below), whose sum is σ = 62617872. Its totient is φ = 41745240.

The previous prime is 52181531. The next prime is 52181593. The reversal of 52181555 is 55518125.

52181555 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.

It is not a de Polignac number, because 52181555 - 2⁸ = 52181299 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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, 5218151 + ... + 5218160.

It is an arithmetic number, because the mean of its divisors is an integer number (15654468).

Almost surely, 2^52181555 is an apocalyptic number.

52181555 is a deficient number, since it is larger than the sum of its proper divisors (10436317).

52181555 is a wasteful number, since it uses less digits than its factorization.

52181555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10436316.

The product of its digits is 10000, while the sum is 32.

The square root of 52181555 is about 7223.6801562638. The cubic root of 52181555 is about 373.6850060174.

The spelling of 52181555 in words is "fifty-two million, one hundred eighty-one thousand, five hundred fifty-five".