421142331 has 4 divisors (see below), whose sum is σ = 561523112. Its totient is φ = 280761552.

The previous prime is 421142327. The next prime is 421142333. The reversal of 421142331 is 133241124.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 421142331 - 2² = 421142327 is a prime.

It is a super-2 number, since 2×421142331² = 354721725920227122, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 421142298 and 421142307.

It is not an unprimeable number, because it can be changed into a prime (421142333) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 70190386 + ... + 70190391.

It is an arithmetic number, because the mean of its divisors is an integer number (140380778).

Almost surely, 2^421142331 is an apocalyptic number.

421142331 is a deficient number, since it is larger than the sum of its proper divisors (140380781).

421142331 is a wasteful number, since it uses less digits than its factorization.

421142331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140380780.

The product of its digits is 576, while the sum is 21.

The square root of 421142331 is about 20521.7526298316. The cubic root of 421142331 is about 749.5655741920.

Adding to 421142331 its reverse (133241124), we get a palindrome (554383455).

The spelling of 421142331 in words is "four hundred twenty-one million, one hundred forty-two thousand, three hundred thirty-one".