253470612221 has 4 divisors (see below), whose sum is σ = 268380648252. Its totient is φ = 238560576192.

The previous prime is 253470612211. The next prime is 253470612229. The reversal of 253470612221 is 122216074352.

253470612221 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 187652709721 + 65817902500 = 433189^2 + 256550^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-253470612221 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (253470612229) 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, 7455017990 + ... + 7455018023.

It is an arithmetic number, because the mean of its divisors is an integer number (67095162063).

Almost surely, 2^253470612221 is an apocalyptic number.

It is an amenable number.

253470612221 is a deficient number, since it is larger than the sum of its proper divisors (14910036031).

253470612221 is a wasteful number, since it uses less digits than its factorization.

253470612221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14910036030.

The product of its (nonzero) digits is 40320, while the sum is 35.

Adding to 253470612221 its reverse (122216074352), we get a palindrome (375686686573).

The spelling of 253470612221 in words is "two hundred fifty-three billion, four hundred seventy million, six hundred twelve thousand, two hundred twenty-one".