42003403523 has 4 divisors (see below), whose sum is σ = 42006171480. Its totient is φ = 42000635568.

The previous prime is 42003403457. The next prime is 42003403571. The reversal of 42003403523 is 32530430024.

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 42003403523 - 2²⁴ = 41986626307 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 42003403492 and 42003403501.

It is not an unprimeable number, because it can be changed into a prime (42003403573) 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, 1361090 + ... + 1391607.

It is an arithmetic number, because the mean of its divisors is an integer number (10501542870).

Almost surely, 2^42003403523 is an apocalyptic number.

42003403523 is a deficient number, since it is larger than the sum of its proper divisors (2767957).

42003403523 is a wasteful number, since it uses less digits than its factorization.

42003403523 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2767956.

The product of its (nonzero) digits is 8640, while the sum is 26.

Adding to 42003403523 its reverse (32530430024), we get a palindrome (74533833547).

The spelling of 42003403523 in words is "forty-two billion, three million, four hundred three thousand, five hundred twenty-three".