421312133 has 8 divisors (see below), whose sum is σ = 460304256. Its totient is φ = 382435200.

The previous prime is 421312117. The next prime is 421312153. The reversal of 421312133 is 331213124.

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 421312133 - 2⁴ = 421312117 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421312153) 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, 21053 + ... + 35858.

It is an arithmetic number, because the mean of its divisors is an integer number (57538032).

Almost surely, 2^421312133 is an apocalyptic number.

It is an amenable number.

421312133 is a deficient number, since it is larger than the sum of its proper divisors (38992123).

421312133 is a wasteful number, since it uses less digits than its factorization.

421312133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57595.

The product of its digits is 432, while the sum is 20.

The square root of 421312133 is about 20525.8893351786. The cubic root of 421312133 is about 749.6663007336. Note that the first 3 decimals are identical.

Adding to 421312133 its reverse (331213124), we get a palindrome (752525257).

Subtracting from 421312133 its reverse (331213124), we obtain a palindrome (90099009).

The spelling of 421312133 in words is "four hundred twenty-one million, three hundred twelve thousand, one hundred thirty-three".