52581919 has 4 divisors (see below), whose sum is σ = 56626696. Its totient is φ = 48537144.

The previous prime is 52581899. The next prime is 52581929. The reversal of 52581919 is 91918525.

52581919 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 a cyclic number.

It is not a de Polignac number, because 52581919 - 2⁹ = 52581407 is a prime.

It is a super-2 number, since 2×52581919² = 5529716411445122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (52581929) 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, 2022369 + ... + 2022394.

It is an arithmetic number, because the mean of its divisors is an integer number (14156674).

Almost surely, 2^52581919 is an apocalyptic number.

52581919 is a deficient number, since it is larger than the sum of its proper divisors (4044777).

52581919 is a wasteful number, since it uses less digits than its factorization.

52581919 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4044776.

The product of its digits is 32400, while the sum is 40.

The square root of 52581919 is about 7251.3391177078. The cubic root of 52581919 is about 374.6382740052.

The spelling of 52581919 in words is "fifty-two million, five hundred eighty-one thousand, nine hundred nineteen".