345120553 has 4 divisors (see below), whose sum is σ = 365421780. Its totient is φ = 324819328.

The previous prime is 345120533. The next prime is 345120569. The reversal of 345120553 is 355021543.

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 112954384 + 232166169 = 10628^2 + 15237^2 .

It is a cyclic number.

It is not a de Polignac number, because 345120553 - 2²⁵ = 311566121 is a prime.

It is a super-2 number, since 2×345120553² = 238216392206051618, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (345120533) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10150588 + ... + 10150621.

It is an arithmetic number, because the mean of its divisors is an integer number (91355445).

Almost surely, 2^345120553 is an apocalyptic number.

It is an amenable number.

345120553 is a deficient number, since it is larger than the sum of its proper divisors (20301227).

345120553 is a wasteful number, since it uses less digits than its factorization.

345120553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20301226.

The product of its (nonzero) digits is 9000, while the sum is 28.

The square root of 345120553 is about 18577.4205152384. The cubic root of 345120553 is about 701.4395904308.

The spelling of 345120553 in words is "three hundred forty-five million, one hundred twenty thousand, five hundred fifty-three".