345131513 has 4 divisors (see below), whose sum is σ = 349289808. Its totient is φ = 340973220.

The previous prime is 345131503. The next prime is 345131519. The reversal of 345131513 is 315131543.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 315131543 = 277 ⋅1137659.

It is a cyclic number.

It is not a de Polignac number, because 345131513 - 2¹⁴ = 345115129 is a prime.

It is a super-3 number, since 3×345131513³ (a number of 27 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (345131519) 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, 2079023 + ... + 2079188.

It is an arithmetic number, because the mean of its divisors is an integer number (87322452).

Almost surely, 2^345131513 is an apocalyptic number.

It is an amenable number.

345131513 is a deficient number, since it is larger than the sum of its proper divisors (4158295).

345131513 is an equidigital number, since it uses as much as digits as its factorization.

345131513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4158294.

The product of its digits is 2700, while the sum is 26.

The square root of 345131513 is about 18577.7154946457. The cubic root of 345131513 is about 701.4470155624.

The spelling of 345131513 in words is "three hundred forty-five million, one hundred thirty-one thousand, five hundred thirteen".