231503422620 has 96 divisors (see below), whose sum is σ = 668715522048. Its totient is φ = 59796271872.

The previous prime is 231503422573. The next prime is 231503422621. The reversal of 231503422620 is 26224305132.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231503422621) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 261247 + ... + 728873.

It is an arithmetic number, because the mean of its divisors is an integer number (6965786688).

Almost surely, 2^231503422620 is an apocalyptic number.

231503422620 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 231503422620, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (334357761024).

231503422620 is an abundant number, since it is smaller than the sum of its proper divisors (437212099428).

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

231503422620 is a wasteful number, since it uses less digits than its factorization.

231503422620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 467899 (or 467897 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 30.

Adding to 231503422620 its reverse (26224305132), we get a palindrome (257727727752).

The spelling of 231503422620 in words is "two hundred thirty-one billion, five hundred three million, four hundred twenty-two thousand, six hundred twenty".