52491565 has 8 divisors (see below), whose sum is σ = 71988480. Its totient is φ = 35994192.

The previous prime is 52491559. The next prime is 52491583. The reversal of 52491565 is 56519425.

52491565 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-52491565 is a prime.

It is a super-2 number, since 2×52491565² = 5510728792298450, which contains 22 as substring.

It is a congruent 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 7 ways as a sum of consecutive naturals, for example, 749845 + ... + 749914.

It is an arithmetic number, because the mean of its divisors is an integer number (8998560).

Almost surely, 2^52491565 is an apocalyptic number.

It is an amenable number.

52491565 is a deficient number, since it is larger than the sum of its proper divisors (19496915).

52491565 is a wasteful number, since it uses less digits than its factorization.

52491565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1499771.

The product of its digits is 54000, while the sum is 37.

The square root of 52491565 is about 7245.1062794137. The cubic root of 52491565 is about 374.4235647508.

The spelling of 52491565 in words is "fifty-two million, four hundred ninety-one thousand, five hundred sixty-five".