345231405 has 12 divisors (see below), whose sum is σ = 598401180. Its totient is φ = 184123392.

The previous prime is 345231379. The next prime is 345231409. The reversal of 345231405 is 504132543.

345231405 is a `hidden beast` number, since 345 + 2 + 314 + 0 + 5 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 35964009 + 309267396 = 5997^2 + 17586^2 .

It is not a de Polignac number, because 345231405 - 2⁵ = 345231373 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (345231409) 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 11 ways as a sum of consecutive naturals, for example, 3835860 + ... + 3835949.

It is an arithmetic number, because the mean of its divisors is an integer number (49866765).

Almost surely, 2^345231405 is an apocalyptic number.

It is an amenable number.

345231405 is a deficient number, since it is larger than the sum of its proper divisors (253169775).

345231405 is a wasteful number, since it uses less digits than its factorization.

345231405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7671820 (or 7671817 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 27.

The square root of 345231405 is about 18580.4037900149. The cubic root of 345231405 is about 701.5146827015.

Adding to 345231405 its reverse (504132543), we get a palindrome (849363948).

The spelling of 345231405 in words is "three hundred forty-five million, two hundred thirty-one thousand, four hundred five".