340342131 has 4 divisors (see below), whose sum is σ = 453789512. Its totient is φ = 226894752.

The previous prime is 340342129. The next prime is 340342139. The reversal of 340342131 is 131243043.

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

It is not a de Polignac number, because 340342131 - 2¹ = 340342129 is a prime.

It is a super-2 number, since 2×340342131² = 231665532267242322, 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 = 340342098 and 340342107.

It is not an unprimeable number, because it can be changed into a prime (340342139) 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, 56723686 + ... + 56723691.

It is an arithmetic number, because the mean of its divisors is an integer number (113447378).

Almost surely, 2^340342131 is an apocalyptic number.

340342131 is a deficient number, since it is larger than the sum of its proper divisors (113447381).

340342131 is a wasteful number, since it uses less digits than its factorization.

340342131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 113447380.

The product of its (nonzero) digits is 864, while the sum is 21.

The square root of 340342131 is about 18448.3639111982. The cubic root of 340342131 is about 698.1872354523.

Adding to 340342131 its reverse (131243043), we get a palindrome (471585174).

The spelling of 340342131 in words is "three hundred forty million, three hundred forty-two thousand, one hundred thirty-one".