4351253553221 has 8 divisors (see below), whose sum is σ = 4395577806840. Its totient is φ = 4307009381568.

The previous prime is 4351253553191. The next prime is 4351253553259. The reversal of 4351253553221 is 1223553521534.

It can be written as a sum of positive squares in 4 ways, for example, as 1508610345025 + 2842643208196 = 1228255^2 + 1686014^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 4351253553221 - 2¹⁰ = 4351253552197 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 (4351253550221) 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, 19911266 + ... + 20128611.

It is an arithmetic number, because the mean of its divisors is an integer number (549447225855).

Almost surely, 2^{4351253553221} is an apocalyptic number.

It is an amenable number.

4351253553221 is a deficient number, since it is larger than the sum of its proper divisors (44324253619).

4351253553221 is a wasteful number, since it uses less digits than its factorization.

4351253553221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40040983.

The product of its digits is 540000, while the sum is 41.

The spelling of 4351253553221 in words is "four trillion, three hundred fifty-one billion, two hundred fifty-three million, five hundred fifty-three thousand, two hundred twenty-one".