345552181 has 4 divisors (see below), whose sum is σ = 372133132. Its totient is φ = 318971232.

The previous prime is 345552173. The next prime is 345552191. The reversal of 345552181 is 181255543.

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 40525956 + 305026225 = 6366^2 + 17465^2 .

It is a cyclic number.

It is not a de Polignac number, because 345552181 - 2³ = 345552173 is a prime.

It is a super-3 number, since 3×345552181³ (a number of 27 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (345552191) 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, 13290456 + ... + 13290481.

It is an arithmetic number, because the mean of its divisors is an integer number (93033283).

Almost surely, 2^345552181 is an apocalyptic number.

It is an amenable number.

345552181 is a deficient number, since it is larger than the sum of its proper divisors (26580951).

345552181 is a wasteful number, since it uses less digits than its factorization.

345552181 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26580950.

The product of its digits is 24000, while the sum is 34.

The square root of 345552181 is about 18589.0338909799. The cubic root of 345552181 is about 701.7318891031.

The spelling of 345552181 in words is "three hundred forty-five million, five hundred fifty-two thousand, one hundred eighty-one".