421305231 has 8 divisors (see below), whose sum is σ = 562993200. Its totient is φ = 280243712.

The previous prime is 421305211. The next prime is 421305233. The reversal of 421305231 is 132503124.

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 421305231 - 2⁶ = 421305167 is a prime.

It is a super-2 number, since 2×421305231² = 354996195335926722, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 421305198 and 421305207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421305233) 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, 155040 + ... + 157733.

It is an arithmetic number, because the mean of its divisors is an integer number (70374150).

Almost surely, 2^421305231 is an apocalyptic number.

421305231 is a deficient number, since it is larger than the sum of its proper divisors (141687969).

421305231 is a wasteful number, since it uses less digits than its factorization.

421305231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 313225.

The product of its (nonzero) digits is 720, while the sum is 21.

The square root of 421305231 is about 20525.7212053560. The cubic root of 421305231 is about 749.6622069951.

Adding to 421305231 its reverse (132503124), we get a palindrome (553808355).

The spelling of 421305231 in words is "four hundred twenty-one million, three hundred five thousand, two hundred thirty-one".