340345431 has 6 divisors (see below), whose sum is σ = 491610080. Its totient is φ = 226896948.

The previous prime is 340345429. The next prime is 340345433. The reversal of 340345431 is 134543043.

It is an interprime number because it is at equal distance from previous prime (340345429) and next prime (340345433).

It is not a de Polignac number, because 340345431 - 2¹ = 340345429 is a prime.

It is a super-2 number, since 2×340345431² = 231670024805151522, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 340345395 and 340345404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (340345433) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 18908071 + ... + 18908088.

Almost surely, 2^340345431 is an apocalyptic number.

340345431 is a deficient number, since it is larger than the sum of its proper divisors (151264649).

340345431 is a wasteful number, since it uses less digits than its factorization.

340345431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37816165 (or 37816162 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 27.

The square root of 340345431 is about 18448.4533498069. The cubic root of 340345431 is about 698.1894920153.

Adding to 340345431 its reverse (134543043), we get a palindrome (474888474).

The spelling of 340345431 in words is "three hundred forty million, three hundred forty-five thousand, four hundred thirty-one".