252020534551405 has 4 divisors (see below), whose sum is σ = 302424641461692. Its totient is φ = 201616427641120.

The previous prime is 252020534551391. The next prime is 252020534551459. The reversal of 252020534551405 is 504155435020252.

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 173042369866249 + 78978164685156 = 13154557^2 + 8886966^2 .

It is not a de Polignac number, because 252020534551405 - 2²⁵ = 252020500996973 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25202053455136 + ... + 25202053455145.

It is an arithmetic number, because the mean of its divisors is an integer number (75606160365423).

Almost surely, 2^{252020534551405} is an apocalyptic number.

It is an amenable number.

252020534551405 is a deficient number, since it is larger than the sum of its proper divisors (50404106910287).

252020534551405 is an equidigital number, since it uses as much as digits as its factorization.

252020534551405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50404106910286.

The product of its (nonzero) digits is 1200000, while the sum is 43.

Adding to 252020534551405 its reverse (504155435020252), we get a palindrome (756175969571657).

The spelling of 252020534551405 in words is "two hundred fifty-two trillion, twenty billion, five hundred thirty-four million, five hundred fifty-one thousand, four hundred five".