340431231 has 16 divisors (see below), whose sum is σ = 519174144. Its totient is φ = 194373984.

The previous prime is 340431197. The next prime is 340431233. The reversal of 340431231 is 132134043.

It is not a de Polignac number, because 340431231 - 2⁹ = 340430719 is a prime.

It is a super-2 number, since 2×340431231² = 231786846080350722, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a junction number, because it is equal to n+sod(n) for n = 340431198 and 340431207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (340431233) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22930 + ... + 34736.

It is an arithmetic number, because the mean of its divisors is an integer number (32448384).

Almost surely, 2^340431231 is an apocalyptic number.

340431231 is a deficient number, since it is larger than the sum of its proper divisors (178742913).

340431231 is a wasteful number, since it uses less digits than its factorization.

340431231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13190.

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

The square root of 340431231 is about 18450.7786014574. The cubic root of 340431231 is about 698.2481575354.

Adding to 340431231 its reverse (132134043), we get a palindrome (472565274).

The spelling of 340431231 in words is "three hundred forty million, four hundred thirty-one thousand, two hundred thirty-one".