253433244021 has 4 divisors (see below), whose sum is σ = 337910992032. Its totient is φ = 168955496012.

The previous prime is 253433244019. The next prime is 253433244061. The reversal of 253433244021 is 120442334352.

253433244021 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, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 253433244021 - 2¹ = 253433244019 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (253433244061) 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, 42238874001 + ... + 42238874006.

It is an arithmetic number, because the mean of its divisors is an integer number (84477748008).

Almost surely, 2^253433244021 is an apocalyptic number.

It is an amenable number.

253433244021 is a deficient number, since it is larger than the sum of its proper divisors (84477748011).

253433244021 is an equidigital number, since it uses as much as digits as its factorization.

253433244021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84477748010.

The product of its (nonzero) digits is 69120, while the sum is 33.

Adding to 253433244021 its reverse (120442334352), we get a palindrome (373875578373).

The spelling of 253433244021 in words is "two hundred fifty-three billion, four hundred thirty-three million, two hundred forty-four thousand, twenty-one".