340023353431 has 4 divisors (see below), whose sum is σ = 349213173832. Its totient is φ = 330833533032.

The previous prime is 340023353429. The next prime is 340023353459. The reversal of 340023353431 is 134353320043.

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 340023353431 - 2¹ = 340023353429 is a prime.

It is a super-2 number, since 2×340023353431² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 340023353393 and 340023353402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (340023353471) 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, 4594910145 + ... + 4594910218.

It is an arithmetic number, because the mean of its divisors is an integer number (87303293458).

Almost surely, 2^340023353431 is an apocalyptic number.

340023353431 is a deficient number, since it is larger than the sum of its proper divisors (9189820401).

340023353431 is an equidigital number, since it uses as much as digits as its factorization.

340023353431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9189820400.

The product of its (nonzero) digits is 38880, while the sum is 31.

Adding to 340023353431 its reverse (134353320043), we get a palindrome (474376673474).

The spelling of 340023353431 in words is "three hundred forty billion, twenty-three million, three hundred fifty-three thousand, four hundred thirty-one".