340143631 has 4 divisors (see below), whose sum is σ = 348053992. Its totient is φ = 332233272.

The previous prime is 340143613. The next prime is 340143641. The reversal of 340143631 is 136341043.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 340143631 - 2⁹ = 340143119 is a prime.

It is a super-2 number, since 2×340143631² = 231395379419728322, 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 = 340143596 and 340143605.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (340143641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3955116 + ... + 3955201.

It is an arithmetic number, because the mean of its divisors is an integer number (87013498).

Almost surely, 2^340143631 is an apocalyptic number.

340143631 is a deficient number, since it is larger than the sum of its proper divisors (7910361).

340143631 is an equidigital number, since it uses as much as digits as its factorization.

340143631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7910360.

The product of its (nonzero) digits is 2592, while the sum is 25.

The square root of 340143631 is about 18442.9832456683. The cubic root of 340143631 is about 698.0514729298.

Adding to 340143631 its reverse (136341043), we get a palindrome (476484674).

The spelling of 340143631 in words is "three hundred forty million, one hundred forty-three thousand, six hundred thirty-one".