340431311 has 4 divisors (see below), whose sum is σ = 371379624. Its totient is φ = 309483000.

The previous prime is 340431271. The next prime is 340431317. The reversal of 340431311 is 113134043.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-340431311 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (340431317) 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, 15474140 + ... + 15474161.

It is an arithmetic number, because the mean of its divisors is an integer number (92844906).

Almost surely, 2^340431311 is an apocalyptic number.

340431311 is a deficient number, since it is larger than the sum of its proper divisors (30948313).

340431311 is a wasteful number, since it uses less digits than its factorization.

340431311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30948312.

The product of its (nonzero) digits is 432, while the sum is 20.

The square root of 340431311 is about 18450.7807693875. The cubic root of 340431311 is about 698.2482122306.

Adding to 340431311 its reverse (113134043), we get a palindrome (453565354).

The spelling of 340431311 in words is "three hundred forty million, four hundred thirty-one thousand, three hundred eleven".