253262630021 has 4 divisors (see below), whose sum is σ = 253265609100. Its totient is φ = 253259650944.

The previous prime is 253262629979. The next prime is 253262630051. The reversal of 253262630021 is 120036262352.

253262630021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 52572069796 + 200690560225 = 229286^2 + 447985^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-253262630021 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 253262630021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (253262630051) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1358156 + ... + 1533333.

It is an arithmetic number, because the mean of its divisors is an integer number (63316402275).

Almost surely, 2^253262630021 is an apocalyptic number.

It is an amenable number.

253262630021 is a deficient number, since it is larger than the sum of its proper divisors (2979079).

253262630021 is an equidigital number, since it uses as much as digits as its factorization.

253262630021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2979078.

The product of its (nonzero) digits is 25920, while the sum is 32.

Adding to 253262630021 its reverse (120036262352), we get a palindrome (373298892373).

The spelling of 253262630021 in words is "two hundred fifty-three billion, two hundred sixty-two million, six hundred thirty thousand, twenty-one".