345221761423 has 32 divisors (see below), whose sum is σ = 449832886272. Its totient is φ = 256899535200.

The previous prime is 345221761411. The next prime is 345221761427. The reversal of 345221761423 is 324167122543.

It is not a de Polignac number, because 345221761423 - 2²⁵ = 345188206991 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (345221761427) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 963040 + ... + 1271962.

It is an arithmetic number, because the mean of its divisors is an integer number (14057277696).

Almost surely, 2^345221761423 is an apocalyptic number.

345221761423 is a deficient number, since it is larger than the sum of its proper divisors (104611124849).

345221761423 is a wasteful number, since it uses less digits than its factorization.

345221761423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 309595.

The product of its digits is 241920, while the sum is 40.

Adding to 345221761423 its reverse (324167122543), we get a palindrome (669388883966).

The spelling of 345221761423 in words is "three hundred forty-five billion, two hundred twenty-one million, seven hundred sixty-one thousand, four hundred twenty-three".