340531231 has 4 divisors (see below), whose sum is σ = 340585272. Its totient is φ = 340477192.

The previous prime is 340531223. The next prime is 340531271. The reversal of 340531231 is 132135043.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 132135043 = 59 ⋅2239577.

It is a cyclic number.

It is not a de Polignac number, because 340531231 - 2³ = 340531223 is a prime.

It is a super-2 number, since 2×340531231² = 231923038572750722, which contains 22 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 (340531271) 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, 16096 + ... + 30661.

It is an arithmetic number, because the mean of its divisors is an integer number (85146318).

Almost surely, 2^340531231 is an apocalyptic number.

340531231 is a deficient number, since it is larger than the sum of its proper divisors (54041).

340531231 is an equidigital number, since it uses as much as digits as its factorization.

340531231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54040.

The product of its (nonzero) digits is 1080, while the sum is 22.

The square root of 340531231 is about 18453.4883152211. The cubic root of 340531231 is about 698.3165198297.

Adding to 340531231 its reverse (132135043), we get a palindrome (472666274).

The spelling of 340531231 in words is "three hundred forty million, five hundred thirty-one thousand, two hundred thirty-one".