355142321 has 4 divisors (see below), whose sum is σ = 357404532. Its totient is φ = 352880112.

The previous prime is 355142297. The next prime is 355142339. The reversal of 355142321 is 123241553.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 194993296 + 160149025 = 13964^2 + 12655^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-355142321 is a prime.

It is a super-2 number, since 2×355142321² = 252252136330534082, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (355142351) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1130870 + ... + 1131183.

It is an arithmetic number, because the mean of its divisors is an integer number (89351133).

Almost surely, 2^355142321 is an apocalyptic number.

It is an amenable number.

355142321 is a deficient number, since it is larger than the sum of its proper divisors (2262211).

355142321 is a wasteful number, since it uses less digits than its factorization.

355142321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2262210.

The product of its digits is 3600, while the sum is 26.

The square root of 355142321 is about 18845.2201101499. The cubic root of 355142321 is about 708.1644852014.

Adding to 355142321 its reverse (123241553), we get a palindrome (478383874).

The spelling of 355142321 in words is "three hundred fifty-five million, one hundred forty-two thousand, three hundred twenty-one".