354021203581 has 2 divisors, whose sum is σ = 354021203582. Its totient is φ = 354021203580.

The previous prime is 354021203539. The next prime is 354021203633. The reversal of 354021203581 is 185302120453.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 296435602681 + 57585600900 = 544459^2 + 239970^2 .

It is an emirp because it is prime and its reverse (185302120453) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 354021203581 - 2¹⁹ = 354020679293 is a prime.

It is a super-2 number, since 2×354021203581² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (354021203881) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 177010601790 + 177010601791.

It is an arithmetic number, because the mean of its divisors is an integer number (177010601791).

Almost surely, 2^354021203581 is an apocalyptic number.

It is an amenable number.

354021203581 is a deficient number, since it is larger than the sum of its proper divisors (1).

354021203581 is an equidigital number, since it uses as much as digits as its factorization.

354021203581 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 28800, while the sum is 34.

The spelling of 354021203581 in words is "three hundred fifty-four billion, twenty-one million, two hundred three thousand, five hundred eighty-one".