421010331 has 16 divisors (see below), whose sum is σ = 669433344. Its totient is φ = 230117184.

The previous prime is 421010329. The next prime is 421010339. The reversal of 421010331 is 133010124.

It is not a de Polignac number, because 421010331 - 2¹ = 421010329 is a prime.

It is a super-2 number, since 2×421010331² = 354499397617459122, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 421010331.

It is not an unprimeable number, because it can be changed into a prime (421010339) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 435346 + ... + 436311.

It is an arithmetic number, because the mean of its divisors is an integer number (41839584).

Almost surely, 2^421010331 is an apocalyptic number.

421010331 is a deficient number, since it is larger than the sum of its proper divisors (248423013).

421010331 is a wasteful number, since it uses less digits than its factorization.

421010331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 871690.

The product of its (nonzero) digits is 72, while the sum is 15.

The square root of 421010331 is about 20518.5362782046. The cubic root of 421010331 is about 749.4872530896.

Adding to 421010331 its reverse (133010124), we get a palindrome (554020455).

It can be divided in two parts, 4210 and 10331, that added together give a palindrome (14541).

The spelling of 421010331 in words is "four hundred twenty-one million, ten thousand, three hundred thirty-one".