345231431 has 4 divisors (see below), whose sum is σ = 346032864. Its totient is φ = 344430000.

The previous prime is 345231409. The next prime is 345231443. The reversal of 345231431 is 134132543.

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-345231431 is a prime.

It is a super-2 number, since 2×345231431² = 238369481900615522, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 345231431.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (345231031) 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, 400070 + ... + 400931.

It is an arithmetic number, because the mean of its divisors is an integer number (86508216).

Almost surely, 2^345231431 is an apocalyptic number.

345231431 is a deficient number, since it is larger than the sum of its proper divisors (801433).

345231431 is an equidigital number, since it uses as much as digits as its factorization.

345231431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 801432.

The product of its digits is 4320, while the sum is 26.

The square root of 345231431 is about 18580.4044896768. The cubic root of 345231431 is about 701.5147003123.

Adding to 345231431 its reverse (134132543), we get a palindrome (479363974).

The spelling of 345231431 in words is "three hundred forty-five million, two hundred thirty-one thousand, four hundred thirty-one".