345553231 has 4 divisors (see below), whose sum is σ = 345598264. Its totient is φ = 345508200.

The previous prime is 345553199. The next prime is 345553253. The reversal of 345553231 is 132355543.

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 345553231 - 2⁵ = 345553199 is a prime.

It is a super-2 number, since 2×345553231² = 238814070909078722, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 345553193 and 345553202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (345553291) 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, 7800 + ... + 27421.

It is an arithmetic number, because the mean of its divisors is an integer number (86399566).

Almost surely, 2^345553231 is an apocalyptic number.

345553231 is a deficient number, since it is larger than the sum of its proper divisors (45033).

345553231 is an equidigital number, since it uses as much as digits as its factorization.

345553231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45032.

The product of its digits is 27000, while the sum is 31.

The square root of 345553231 is about 18589.0621334160. The cubic root of 345553231 is about 701.7325998667.

The spelling of 345553231 in words is "three hundred forty-five million, five hundred fifty-three thousand, two hundred thirty-one".