345255561 has 32 divisors (see below), whose sum is σ = 597012480. Its totient is φ = 193086288.

The previous prime is 345255541. The next prime is 345255571. The reversal of 345255561 is 165552543.

345255561 is a `hidden beast` number, since 3 + 45 + 2 + 55 + 561 = 666.

It is not a de Polignac number, because 345255561 - 2⁵ = 345255529 is a prime.

It is not an unprimeable number, because it can be changed into a prime (345255511) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 10551 + ... + 28316.

It is an arithmetic number, because the mean of its divisors is an integer number (18656640).

Almost surely, 2^345255561 is an apocalyptic number.

It is an amenable number.

345255561 is a deficient number, since it is larger than the sum of its proper divisors (251756919).

345255561 is a wasteful number, since it uses less digits than its factorization.

345255561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38930 (or 38924 counting only the distinct ones).

The product of its digits is 90000, while the sum is 36.

The square root of 345255561 is about 18581.0538183387. The cubic root of 345255561 is about 701.5310440881.

The spelling of 345255561 in words is "three hundred forty-five million, two hundred fifty-five thousand, five hundred sixty-one".