52206145 has 8 divisors (see below), whose sum is σ = 62753256. Its totient is φ = 41694336.

The previous prime is 52206137. The next prime is 52206151. The reversal of 52206145 is 54160225.

It can be written as a sum of positive squares in 4 ways, for example, as 1838736 + 50367409 = 1356^2 + 7097^2 .

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 52206145 - 2³ = 52206137 is a prime.

It is a super-2 number, since 2×52206145² = 5450963151522050, which contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5452 + ... + 11581.

It is an arithmetic number, because the mean of its divisors is an integer number (7844157).

Almost surely, 2^52206145 is an apocalyptic number.

It is an amenable number.

52206145 is a deficient number, since it is larger than the sum of its proper divisors (10547111).

52206145 is a wasteful number, since it uses less digits than its factorization.

52206145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17651.

The product of its (nonzero) digits is 2400, while the sum is 25.

The square root of 52206145 is about 7225.3819968220. The cubic root of 52206145 is about 373.7436951543.

The spelling of 52206145 in words is "fifty-two million, two hundred six thousand, one hundred forty-five".