421340331 has 8 divisors (see below), whose sum is σ = 561957840. Its totient is φ = 280808192.

The previous prime is 421340327. The next prime is 421340351. The reversal of 421340331 is 133043124.

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 421340331 - 2² = 421340327 is a prime.

It is a super-2 number, since 2×421340331² = 355055349054379122, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 421340298 and 421340307.

It is not an unprimeable number, because it can be changed into a prime (421340321) 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, 8766 + ... + 30323.

It is an arithmetic number, because the mean of its divisors is an integer number (70244730).

Almost surely, 2^421340331 is an apocalyptic number.

421340331 is a deficient number, since it is larger than the sum of its proper divisors (140617509).

421340331 is a wasteful number, since it uses less digits than its factorization.

421340331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42685.

The product of its (nonzero) digits is 864, while the sum is 21.

The square root of 421340331 is about 20526.5762123156. The cubic root of 421340331 is about 749.6830251659.

Adding to 421340331 its reverse (133043124), we get a palindrome (554383455).

It can be divided in two parts, 4213 and 40331, that added together give a palindrome (44544).

The spelling of 421340331 in words is "four hundred twenty-one million, three hundred forty thousand, three hundred thirty-one".