352223621 has 8 divisors (see below), whose sum is σ = 361933440. Its totient is φ = 342582912.

The previous prime is 352223611. The next prime is 352223659. The reversal of 352223621 is 126322253.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 352223621 - 2²² = 348029317 is a prime.

It is a super-2 number, since 2×352223621² = 248122958380703282, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (352223611) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6860 + ... + 27413.

It is an arithmetic number, because the mean of its divisors is an integer number (45241680).

Almost surely, 2^352223621 is an apocalyptic number.

It is an amenable number.

352223621 is a deficient number, since it is larger than the sum of its proper divisors (9709819).

352223621 is a wasteful number, since it uses less digits than its factorization.

352223621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34555.

The product of its digits is 4320, while the sum is 26.

The square root of 352223621 is about 18767.6216127670. The cubic root of 352223621 is about 706.2191543581.

Adding to 352223621 its reverse (126322253), we get a palindrome (478545874).

The spelling of 352223621 in words is "three hundred fifty-two million, two hundred twenty-three thousand, six hundred twenty-one".