252148281157 has 4 divisors (see below), whose sum is σ = 258298239276. Its totient is φ = 245998323040.

The previous prime is 252148281137. The next prime is 252148281221. The reversal of 252148281157 is 751182841252.

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 112680391041 + 139467890116 = 335679^2 + 373454^2 .

It is a cyclic number.

It is not a de Polignac number, because 252148281157 - 2¹¹ = 252148279109 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (252148281137) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3074978998 + ... + 3074979079.

It is an arithmetic number, because the mean of its divisors is an integer number (64574559819).

Almost surely, 2^252148281157 is an apocalyptic number.

It is an amenable number.

252148281157 is a deficient number, since it is larger than the sum of its proper divisors (6149958119).

252148281157 is an equidigital number, since it uses as much as digits as its factorization.

252148281157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6149958118.

The product of its digits is 358400, while the sum is 46.

The spelling of 252148281157 in words is "two hundred fifty-two billion, one hundred forty-eight million, two hundred eighty-one thousand, one hundred fifty-seven".