345138415 has 4 divisors (see below), whose sum is σ = 414166104. Its totient is φ = 276110728.

The previous prime is 345138413. The next prime is 345138421. The reversal of 345138415 is 514831543.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 345138415 - 2¹ = 345138413 is a prime.

It is a super-3 number, since 3×345138415³ (a number of 27 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (345138413) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 34513837 + ... + 34513846.

It is an arithmetic number, because the mean of its divisors is an integer number (103541526).

Almost surely, 2^345138415 is an apocalyptic number.

345138415 is a deficient number, since it is larger than the sum of its proper divisors (69027689).

345138415 is an equidigital number, since it uses as much as digits as its factorization.

345138415 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69027688.

The product of its digits is 28800, while the sum is 34.

The square root of 345138415 is about 18577.9012539092. The cubic root of 345138415 is about 701.4516914177.

Adding to 345138415 its reverse (514831543), we get a palindrome (859969958).

The spelling of 345138415 in words is "three hundred forty-five million, one hundred thirty-eight thousand, four hundred fifteen".