421747331 has 8 divisors (see below), whose sum is σ = 425256000. Its totient is φ = 418248000.

The previous prime is 421747321. The next prime is 421747363. The reversal of 421747331 is 133747124.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-421747331 is a prime.

It is a super-2 number, since 2×421747331² = 355741622411247122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (421747321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 110015 + ... + 113783.

It is an arithmetic number, because the mean of its divisors is an integer number (53157000).

Almost surely, 2^421747331 is an apocalyptic number.

421747331 is a deficient number, since it is larger than the sum of its proper divisors (3508669).

421747331 is a wasteful number, since it uses less digits than its factorization.

421747331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4669.

The product of its digits is 14112, while the sum is 32.

The square root of 421747331 is about 20536.4877961155. The cubic root of 421747331 is about 749.9243366633.

The spelling of 421747331 in words is "four hundred twenty-one million, seven hundred forty-seven thousand, three hundred thirty-one".