345555553 has 4 divisors (see below), whose sum is σ = 394920640. Its totient is φ = 296190468.

The previous prime is 345555547. The next prime is 345555569. The reversal of 345555553 is 355555543.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a de Polignac number, because none of the positive numbers 2^k-345555553 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (345555593) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24682533 + ... + 24682546.

It is an arithmetic number, because the mean of its divisors is an integer number (98730160).

Almost surely, 2^345555553 is an apocalyptic number.

It is an amenable number.

345555553 is a deficient number, since it is larger than the sum of its proper divisors (49365087).

345555553 is an equidigital number, since it uses as much as digits as its factorization.

345555553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49365086.

The product of its digits is 562500, while the sum is 40.

The square root of 345555553 is about 18589.1245893937. The cubic root of 345555553 is about 701.7341716645.

The spelling of 345555553 in words is "three hundred forty-five million, five hundred fifty-five thousand, five hundred fifty-three".