421002331 has 8 divisors (see below), whose sum is σ = 448761600. Its totient is φ = 393575808.

The previous prime is 421002319. The next prime is 421002343. The reversal of 421002331 is 133200124.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (421002319) and next prime (421002343).

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 421002331 - 2²⁵ = 387447899 is a prime.

It is a super-2 number, since 2×421002331² = 354485925414867122, which contains 22 as substring.

It is a Duffinian number.

421002331 is a modest number, since divided by 2331 gives 421 as remainder.

It is not an unprimeable number, because it can be changed into a prime (421002731) 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, 80571 + ... + 85636.

It is an arithmetic number, because the mean of its divisors is an integer number (56095200).

Almost surely, 2^421002331 is an apocalyptic number.

421002331 is a deficient number, since it is larger than the sum of its proper divisors (27759269).

421002331 is a wasteful number, since it uses less digits than its factorization.

421002331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 166373.

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 421002331 is about 20518.3413315989. The cubic root of 421002331 is about 749.4825058300.

Adding to 421002331 its reverse (133200124), we get a palindrome (554202455).

The spelling of 421002331 in words is "four hundred twenty-one million, two thousand, three hundred thirty-one".