331402423523 has 4 divisors (see below), whose sum is σ = 348844656360. Its totient is φ = 313960190688.

The previous prime is 331402423507. The next prime is 331402423531. The reversal of 331402423523 is 325324204133.

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 331402423523 - 2⁴ = 331402423507 is a prime.

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 331402423523.

It is not an unprimeable number, because it can be changed into a prime (331402423123) 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, 8721116390 + ... + 8721116427.

It is an arithmetic number, because the mean of its divisors is an integer number (87211164090).

Almost surely, 2^331402423523 is an apocalyptic number.

331402423523 is a deficient number, since it is larger than the sum of its proper divisors (17442232837).

331402423523 is a wasteful number, since it uses less digits than its factorization.

331402423523 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17442232836.

The product of its (nonzero) digits is 51840, while the sum is 32.

Adding to 331402423523 its reverse (325324204133), we get a palindrome (656726627656).

The spelling of 331402423523 in words is "three hundred thirty-one billion, four hundred two million, four hundred twenty-three thousand, five hundred twenty-three".