421403231 has 8 divisors (see below), whose sum is σ = 427660800. Its totient is φ = 415158912.

The previous prime is 421403221. The next prime is 421403251. The reversal of 421403231 is 132304124.

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 421403231 - 2⁶ = 421403167 is a prime.

It is a super-2 number, since 2×421403231² = 355161366194478722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421403221) 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, 73826 + ... + 79328.

It is an arithmetic number, because the mean of its divisors is an integer number (53457600).

Almost surely, 2^421403231 is an apocalyptic number.

421403231 is a deficient number, since it is larger than the sum of its proper divisors (6257569).

421403231 is a wasteful number, since it uses less digits than its factorization.

421403231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6625.

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 421403231 is about 20528.1083151858. The cubic root of 421403231 is about 749.7203289103.

Adding to 421403231 its reverse (132304124), we get a palindrome (553707355).

The spelling of 421403231 in words is "four hundred twenty-one million, four hundred three thousand, two hundred thirty-one".