231040002 has 24 divisors (see below), whose sum is σ = 473645808. Its totient is φ = 75131680.

The previous prime is 231039971. The next prime is 231040009. The reversal of 231040002 is 200040132.

It is a self number, because there is not a number n which added to its sum of digits gives 231040002.

It is not an unprimeable number, because it can be changed into a prime (231040009) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1368 + ... + 21539.

It is an arithmetic number, because the mean of its divisors is an integer number (19735242).

Almost surely, 2^231040002 is an apocalyptic number.

231040002 is an abundant number, since it is smaller than the sum of its proper divisors (242605806).

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

231040002 is a wasteful number, since it uses less digits than its factorization.

231040002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22994 (or 22953 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 12.

The square root of 231040002 is about 15200.0000657895. Note that the first 4 decimals coincide. The cubic root of 231040002 is about 613.6146595222.

Adding to 231040002 its reverse (200040132), we get a palindrome (431080134).

The spelling of 231040002 in words is "two hundred thirty-one million, forty thousand, two".