253453422221 has 4 divisors (see below), whose sum is σ = 254971107552. Its totient is φ = 251935736892.

The previous prime is 253453422199. The next prime is 253453422223. The reversal of 253453422221 is 122224354352.

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 253453422221 - 2¹⁰ = 253453421197 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 (253453422223) 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, 758842415 + ... + 758842748.

It is an arithmetic number, because the mean of its divisors is an integer number (63742776888).

Almost surely, 2^253453422221 is an apocalyptic number.

It is an amenable number.

253453422221 is a deficient number, since it is larger than the sum of its proper divisors (1517685331).

253453422221 is a wasteful number, since it uses less digits than its factorization.

253453422221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1517685330.

The product of its digits is 115200, while the sum is 35.

Adding to 253453422221 its reverse (122224354352), we get a palindrome (375677776573).

The spelling of 253453422221 in words is "two hundred fifty-three billion, four hundred fifty-three million, four hundred twenty-two thousand, two hundred twenty-one".