345521111 has 24 divisors (see below), whose sum is σ = 397629120. Its totient is φ = 298305216.

The previous prime is 345521089. The next prime is 345521123. The reversal of 345521111 is 111125543.

It is a de Polignac number, because none of the positive numbers 2^k-345521111 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (345521411) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 322685 + ... + 323753.

It is an arithmetic number, because the mean of its divisors is an integer number (16567880).

Almost surely, 2^345521111 is an apocalyptic number.

345521111 is a deficient number, since it is larger than the sum of its proper divisors (52108009).

345521111 is a wasteful number, since it uses less digits than its factorization.

345521111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1175 (or 1152 counting only the distinct ones).

The product of its digits is 600, while the sum is 23.

The square root of 345521111 is about 18588.1981644268. The cubic root of 345521111 is about 701.7108566180.

Adding to 345521111 its reverse (111125543), we get a palindrome (456646654).

The spelling of 345521111 in words is "three hundred forty-five million, five hundred twenty-one thousand, one hundred eleven".