421400333 has 4 divisors (see below), whose sum is σ = 421586880. Its totient is φ = 421213788.

The previous prime is 421400281. The next prime is 421400339. The reversal of 421400333 is 333004124.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-421400333 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 (421400339) 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, 89843 + ... + 94416.

It is an arithmetic number, because the mean of its divisors is an integer number (105396720).

Almost surely, 2^421400333 is an apocalyptic number.

It is an amenable number.

421400333 is a deficient number, since it is larger than the sum of its proper divisors (186547).

421400333 is a wasteful number, since it uses less digits than its factorization.

421400333 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 186546.

The product of its (nonzero) digits is 864, while the sum is 20.

The square root of 421400333 is about 20528.0377289209. The cubic root of 421400333 is about 749.7186102915.

Adding to 421400333 its reverse (333004124), we get a palindrome (754404457).

The spelling of 421400333 in words is "four hundred twenty-one million, four hundred thousand, three hundred thirty-three".