354357152221 has 4 divisors (see below), whose sum is σ = 354360000700. Its totient is φ = 354354303744.

The previous prime is 354357152167. The next prime is 354357152243. The reversal of 354357152221 is 122251753453.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 122251753453 = 6967 ⋅17547259.

It can be written as a sum of positive squares in 2 ways, for example, as 145626955321 + 208730196900 = 381611^2 + 456870^2 .

It is a cyclic number.

It is not a de Polignac number, because 354357152221 - 2²⁷ = 354222934493 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 (354357152021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1228686 + ... + 1489423.

It is an arithmetic number, because the mean of its divisors is an integer number (88590000175).

Almost surely, 2^354357152221 is an apocalyptic number.

It is an amenable number.

354357152221 is a deficient number, since it is larger than the sum of its proper divisors (2848479).

354357152221 is a wasteful number, since it uses less digits than its factorization.

354357152221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2848478.

The product of its digits is 252000, while the sum is 40.

The spelling of 354357152221 in words is "three hundred fifty-four billion, three hundred fifty-seven million, one hundred fifty-two thousand, two hundred twenty-one".