231053501550 has 96 divisors (see below), whose sum is σ = 576683089920. Its totient is φ = 61220848000.

The previous prime is 231053501543. The next prime is 231053501561. The reversal of 231053501550 is 55105350132.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 15446575 + ... + 15461525.

It is an arithmetic number, because the mean of its divisors is an integer number (6007115520).

Almost surely, 2^231053501550 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 231053501550, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (288341544960).

231053501550 is an abundant number, since it is smaller than the sum of its proper divisors (345629588370).

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

231053501550 is a wasteful number, since it uses less digits than its factorization.

231053501550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15618 (or 15613 counting only the distinct ones).

The product of its (nonzero) digits is 11250, while the sum is 30.

Adding to 231053501550 its reverse (55105350132), we get a palindrome (286158851682).

The spelling of 231053501550 in words is "two hundred thirty-one billion, fifty-three million, five hundred one thousand, five hundred fifty".