231240220002 has 24 divisors (see below), whose sum is σ = 546567793200. Its totient is φ = 70072793880.

The previous prime is 231240219983. The next prime is 231240220021. The reversal of 231240220002 is 200022042132.

It is an interprime number because it is at equal distance from previous prime (231240219983) and next prime (231240220021).

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

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 583939752 + ... + 583940147.

It is an arithmetic number, because the mean of its divisors is an integer number (22773658050).

Almost surely, 2^231240220002 is an apocalyptic number.

231240220002 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

231240220002 is an abundant number, since it is smaller than the sum of its proper divisors (315327573198).

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

231240220002 is a wasteful number, since it uses less digits than its factorization.

231240220002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1167879918 (or 1167879915 counting only the distinct ones).

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

Adding to 231240220002 its reverse (200022042132), we get a palindrome (431262262134).

The spelling of 231240220002 in words is "two hundred thirty-one billion, two hundred forty million, two hundred twenty thousand, two".