345215553 has 16 divisors (see below), whose sum is σ = 471816576. Its totient is φ = 224432000.

The previous prime is 345215551. The next prime is 345215573. The reversal of 345215553 is 355512543.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 345215553 - 2¹ = 345215551 is a prime.

It is not an unprimeable number, because it can be changed into a prime (345215551) 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 15 ways as a sum of consecutive naturals, for example, 20053 + ... + 33053.

It is an arithmetic number, because the mean of its divisors is an integer number (29488536).

Almost surely, 2^345215553 is an apocalyptic number.

It is an amenable number.

345215553 is a deficient number, since it is larger than the sum of its proper divisors (126601023).

345215553 is a wasteful number, since it uses less digits than its factorization.

345215553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13224.

The product of its digits is 45000, while the sum is 33.

The square root of 345215553 is about 18579.9772066599. The cubic root of 345215553 is about 701.5039453808.

The spelling of 345215553 in words is "three hundred forty-five million, two hundred fifteen thousand, five hundred fifty-three".