354003521 has 2 divisors, whose sum is σ = 354003522. Its totient is φ = 354003520.

The previous prime is 354003509. The next prime is 354003541. The reversal of 354003521 is 125300453.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 243984400 + 110019121 = 15620^2 + 10489^2 .

It is an emirp because it is prime and its reverse (125300453) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 354003521 - 2¹⁰ = 354002497 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (354003541) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 177001760 + 177001761.

It is an arithmetic number, because the mean of its divisors is an integer number (177001761).

Almost surely, 2^354003521 is an apocalyptic number.

It is an amenable number.

354003521 is a deficient number, since it is larger than the sum of its proper divisors (1).

354003521 is an equidigital number, since it uses as much as digits as its factorization.

354003521 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1800, while the sum is 23.

The square root of 354003521 is about 18814.9812915134. The cubic root of 354003521 is about 707.4067408614.

Adding to 354003521 its reverse (125300453), we get a palindrome (479303974).

The spelling of 354003521 in words is "three hundred fifty-four million, three thousand, five hundred twenty-one".