355250305521221 has 8 divisors (see below), whose sum is σ = 387549165964800. Its totient is φ = 322952008098240.

The previous prime is 355250305521193. The next prime is 355250305521257. The reversal of 355250305521221 is 122125503052553.

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 355250305521221 - 2¹⁴ = 355250305504837 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 (355250305541221) 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, 139435301 + ... + 141960218.

It is an arithmetic number, because the mean of its divisors is an integer number (48443645745600).

Almost surely, 2^{355250305521221} is an apocalyptic number.

It is an amenable number.

355250305521221 is a deficient number, since it is larger than the sum of its proper divisors (32298860443579).

355250305521221 is a wasteful number, since it uses less digits than its factorization.

355250305521221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 281510299.

The product of its (nonzero) digits is 450000, while the sum is 41.

Adding to 355250305521221 its reverse (122125503052553), we get a palindrome (477375808573774).

The spelling of 355250305521221 in words is "three hundred fifty-five trillion, two hundred fifty billion, three hundred five million, five hundred twenty-one thousand, two hundred twenty-one".