252070161 has 24 divisors (see below), whose sum is σ = 395379360. Its totient is φ = 142414272.

The previous prime is 252070153. The next prime is 252070187. The reversal of 252070161 is 161070252.

It is not a de Polignac number, because 252070161 - 2³ = 252070153 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (252070111) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 3450 + ... + 22716.

It is an arithmetic number, because the mean of its divisors is an integer number (16474140).

Almost surely, 2^252070161 is an apocalyptic number.

252070161 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

252070161 is a deficient number, since it is larger than the sum of its proper divisors (143309199).

252070161 is a wasteful number, since it uses less digits than its factorization.

252070161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19373 (or 19366 counting only the distinct ones).

The product of its (nonzero) digits is 840, while the sum is 24.

The square root of 252070161 is about 15876.7175763758. The cubic root of 252070161 is about 631.6945736524.

Subtracting from 252070161 its reverse (161070252), we obtain a palindrome (90999909).

The spelling of 252070161 in words is "two hundred fifty-two million, seventy thousand, one hundred sixty-one".