231424002 has 24 divisors (see below), whose sum is σ = 518710140. Its totient is φ = 74481120.

The previous prime is 231423991. The next prime is 231424007. The reversal of 231424002 is 200424132.

It can be written as a sum of positive squares in 2 ways, for example, as 220789881 + 10634121 = 14859^2 + 3261^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (231424007) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 221149 + ... + 222192.

Almost surely, 2^231424002 is an apocalyptic number.

231424002 is an abundant number, since it is smaller than the sum of its proper divisors (287286138).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

231424002 is a wasteful number, since it uses less digits than its factorization.

231424002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 443378 (or 443375 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

The square root of 231424002 is about 15212.6264004609. The cubic root of 231424002 is about 613.9544240734.

Adding to 231424002 its reverse (200424132), we get a palindrome (431848134).

The spelling of 231424002 in words is "two hundred thirty-one million, four hundred twenty-four thousand, two".