253435543221 has 8 divisors (see below), whose sum is σ = 386187494464. Its totient is φ = 144820310400.

The previous prime is 253435543217. The next prime is 253435543267. The reversal of 253435543221 is 122345534352.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 253435543221 - 2² = 253435543217 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 253435543221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (253435543211) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6034179580 + ... + 6034179621.

It is an arithmetic number, because the mean of its divisors is an integer number (48273436808).

Almost surely, 2^253435543221 is an apocalyptic number.

253435543221 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

253435543221 is a deficient number, since it is larger than the sum of its proper divisors (132751951243).

253435543221 is a wasteful number, since it uses less digits than its factorization.

253435543221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12068359211.

The product of its digits is 432000, while the sum is 39.

The spelling of 253435543221 in words is "two hundred fifty-three billion, four hundred thirty-five million, five hundred forty-three thousand, two hundred twenty-one".