231301223220 has 24 divisors (see below), whose sum is σ = 647643425184. Its totient is φ = 61680326176.

The previous prime is 231301223213. The next prime is 231301223227. The reversal of 231301223220 is 22322103132.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (231301223213) and next prime (231301223227).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231301223227) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1927510134 + ... + 1927510253.

It is an arithmetic number, because the mean of its divisors is an integer number (26985142716).

Almost surely, 2^231301223220 is an apocalyptic number.

231301223220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

231301223220 is an abundant number, since it is smaller than the sum of its proper divisors (416342201964).

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

231301223220 is a wasteful number, since it uses less digits than its factorization.

231301223220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3855020399 (or 3855020397 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 21.

Adding to 231301223220 its reverse (22322103132), we get a palindrome (253623326352).

The spelling of 231301223220 in words is "two hundred thirty-one billion, three hundred one million, two hundred twenty-three thousand, two hundred twenty".