353145533221 has 4 divisors (see below), whose sum is σ = 380310574252. Its totient is φ = 325980492192.

The previous prime is 353145533219. The next prime is 353145533239. The reversal of 353145533221 is 122335541353.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 122335541353 = 344017 ⋅355609.

It can be written as a sum of positive squares in 2 ways, for example, as 187995952225 + 165149580996 = 433585^2 + 406386^2 .

It is a cyclic number.

It is not a de Polignac number, because 353145533221 - 2¹ = 353145533219 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 (353145533201) 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, 13582520496 + ... + 13582520521.

It is an arithmetic number, because the mean of its divisors is an integer number (95077643563).

Almost surely, 2^353145533221 is an apocalyptic number.

It is an amenable number.

353145533221 is a deficient number, since it is larger than the sum of its proper divisors (27165041031).

353145533221 is a wasteful number, since it uses less digits than its factorization.

353145533221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27165041030.

The product of its digits is 162000, while the sum is 37.

The spelling of 353145533221 in words is "three hundred fifty-three billion, one hundred forty-five million, five hundred thirty-three thousand, two hundred twenty-one".