423520421543 has 8 divisors (see below), whose sum is σ = 438188544480. Its totient is φ = 408856563360.

The previous prime is 423520421537. The next prime is 423520421549. The reversal of 423520421543 is 345124025324.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (423520421537) and next prime (423520421549).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 423520421543 - 2⁸ = 423520421287 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (423520421549) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 863480 + ... + 1261997.

It is an arithmetic number, because the mean of its divisors is an integer number (54773568060).

Almost surely, 2^423520421543 is an apocalyptic number.

423520421543 is a deficient number, since it is larger than the sum of its proper divisors (14668122937).

423520421543 is a wasteful number, since it uses less digits than its factorization.

423520421543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2132377.

The product of its (nonzero) digits is 115200, while the sum is 35.

Adding to 423520421543 its reverse (345124025324), we get a palindrome (768644446867).

The spelling of 423520421543 in words is "four hundred twenty-three billion, five hundred twenty million, four hundred twenty-one thousand, five hundred forty-three".