231155235030 has 128 divisors (see below), whose sum is σ = 592514777088. Its totient is φ = 57579496832.

The previous prime is 231155235029. The next prime is 231155235043. The reversal of 231155235030 is 30532551132.

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 pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 15137179 + ... + 15152441.

It is an arithmetic number, because the mean of its divisors is an integer number (4629021696).

Almost surely, 2^231155235030 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 231155235030, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (296257388544).

231155235030 is an abundant number, since it is smaller than the sum of its proper divisors (361359542058).

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

231155235030 is a wasteful number, since it uses less digits than its factorization.

231155235030 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15810.

The product of its (nonzero) digits is 13500, while the sum is 30.

Adding to 231155235030 its reverse (30532551132), we get a palindrome (261687786162).

The spelling of 231155235030 in words is "two hundred thirty-one billion, one hundred fifty-five million, two hundred thirty-five thousand, thirty".