52218545 has 8 divisors (see below), whose sum is σ = 62907624. Its totient is φ = 41611264.

The previous prime is 52218541. The next prime is 52218553. The reversal of 52218545 is 54581225.

52218545 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 4096576 + 48121969 = 2024^2 + 6937^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 52218545 - 2² = 52218541 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (52218541) 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 7 ways as a sum of consecutive naturals, for example, 19034 + ... + 21603.

It is an arithmetic number, because the mean of its divisors is an integer number (7863453).

Almost surely, 2^52218545 is an apocalyptic number.

It is an amenable number.

52218545 is a deficient number, since it is larger than the sum of its proper divisors (10689079).

52218545 is a wasteful number, since it uses less digits than its factorization.

52218545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40899.

The product of its digits is 16000, while the sum is 32.

The square root of 52218545 is about 7226.2400319945. The cubic root of 52218545 is about 373.7732833375.

The spelling of 52218545 in words is "fifty-two million, two hundred eighteen thousand, five hundred forty-five".