421540420233 has 8 divisors (see below), whose sum is σ = 591635677600. Its totient is φ = 266236054848.

The previous prime is 421540420199. The next prime is 421540420289. The reversal of 421540420233 is 332024045124.

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

It is not a de Polignac number, because 421540420233 - 2⁹ = 421540419721 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 421540420233.

It is not an unprimeable number, because it can be changed into a prime (421540421233) 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, 3697722928 + ... + 3697723041.

It is an arithmetic number, because the mean of its divisors is an integer number (73954459700).

Almost surely, 2^421540420233 is an apocalyptic number.

It is an amenable number.

421540420233 is a deficient number, since it is larger than the sum of its proper divisors (170095257367).

421540420233 is a wasteful number, since it uses less digits than its factorization.

421540420233 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7395445991.

The product of its (nonzero) digits is 23040, while the sum is 30.

Adding to 421540420233 its reverse (332024045124), we get a palindrome (753564465357).

The spelling of 421540420233 in words is "four hundred twenty-one billion, five hundred forty million, four hundred twenty thousand, two hundred thirty-three".