352445521 has 4 divisors (see below), whose sum is σ = 352495972. Its totient is φ = 352395072.

The previous prime is 352445507. The next prime is 352445539. The reversal of 352445521 is 125544253.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 125544253 = 347 ⋅361799.

It can be written as a sum of positive squares in 2 ways, for example, as 27040000 + 325405521 = 5200^2 + 18039^2 .

It is a cyclic number.

It is not a de Polignac number, because 352445521 - 2¹⁷ = 352314449 is a prime.

It is a super-2 number, since 2×352445521² = 248435690545922882, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (352445551) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12660 + ... + 29413.

It is an arithmetic number, because the mean of its divisors is an integer number (88123993).

Almost surely, 2^352445521 is an apocalyptic number.

It is an amenable number.

352445521 is a deficient number, since it is larger than the sum of its proper divisors (50451).

352445521 is an equidigital number, since it uses as much as digits as its factorization.

352445521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50450.

The product of its digits is 24000, while the sum is 31.

The square root of 352445521 is about 18773.5324592896. The cubic root of 352445521 is about 706.3674286584.

Adding to 352445521 its reverse (125544253), we get a palindrome (477989774).

The spelling of 352445521 in words is "three hundred fifty-two million, four hundred forty-five thousand, five hundred twenty-one".