252081605 has 4 divisors (see below), whose sum is σ = 302497932. Its totient is φ = 201665280.

The previous prime is 252081589. The next prime is 252081631. The reversal of 252081605 is 506180252.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 99880036 + 152201569 = 9994^2 + 12337^2 .

It is not a de Polignac number, because 252081605 - 2⁴ = 252081589 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25208156 + ... + 25208165.

It is an arithmetic number, because the mean of its divisors is an integer number (75624483).

Almost surely, 2^252081605 is an apocalyptic number.

It is an amenable number.

252081605 is a deficient number, since it is larger than the sum of its proper divisors (50416327).

252081605 is an equidigital number, since it uses as much as digits as its factorization.

252081605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50416326.

The product of its (nonzero) digits is 4800, while the sum is 29.

The square root of 252081605 is about 15877.0779742369. The cubic root of 252081605 is about 631.7041331646.

The spelling of 252081605 in words is "two hundred fifty-two million, eighty-one thousand, six hundred five".