231220144030 has 32 divisors (see below), whose sum is σ = 417187998720. Its totient is φ = 92267799840.

The previous prime is 231220144021. The next prime is 231220144039. The reversal of 231220144030 is 30441022132.

It is an interprime number because it is at equal distance from previous prime (231220144021) and next prime (231220144039).

It is a junction number, because it is equal to n+sod(n) for n = 231220143992 and 231220144010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231220144039) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20151195 + ... + 20162665.

It is an arithmetic number, because the mean of its divisors is an integer number (13037124960).

Almost surely, 2^231220144030 is an apocalyptic number.

231220144030 is a deficient number, since it is larger than the sum of its proper divisors (185967854690).

231220144030 is a wasteful number, since it uses less digits than its factorization.

231220144030 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16104.

The product of its (nonzero) digits is 1152, while the sum is 22.

Adding to 231220144030 its reverse (30441022132), we get a palindrome (261661166162).

The spelling of 231220144030 in words is "two hundred thirty-one billion, two hundred twenty million, one hundred forty-four thousand, thirty".