345553331 has 4 divisors (see below), whose sum is σ = 346174272. Its totient is φ = 344932392.

The previous prime is 345553309. The next prime is 345553337. The reversal of 345553331 is 133355543.

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

It is a cyclic number.

It is not a de Polignac number, because 345553331 - 2⁶ = 345553267 is a prime.

It is a super-2 number, since 2×345553331² = 238814209130391122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (345553337) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 309635 + ... + 310748.

It is an arithmetic number, because the mean of its divisors is an integer number (86543568).

Almost surely, 2^345553331 is an apocalyptic number.

345553331 is a deficient number, since it is larger than the sum of its proper divisors (620941).

345553331 is an equidigital number, since it uses as much as digits as its factorization.

345553331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 620940.

The product of its digits is 40500, while the sum is 32.

The square root of 345553331 is about 18589.0648231696. The cubic root of 345553331 is about 701.7326675584.

The spelling of 345553331 in words is "three hundred forty-five million, five hundred fifty-three thousand, three hundred thirty-one".