153231122440 has 128 divisors (see below), whose sum is σ = 377759790720. Its totient is φ = 55477094400.

The previous prime is 153231122437. The next prime is 153231122453. The reversal of 153231122440 is 44221132351.

It is a junction number, because it is equal to n+sod(n) for n = 153231122399 and 153231122408.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 173534239 + ... + 173535121.

It is an arithmetic number, because the mean of its divisors is an integer number (2951248365).

Almost surely, 2^153231122440 is an apocalyptic number.

153231122440 is a gapful number since it is divisible by the number (10) 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 153231122440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (188879895360).

153231122440 is an abundant number, since it is smaller than the sum of its proper divisors (224528668280).

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

153231122440 is a wasteful number, since it uses less digits than its factorization.

153231122440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2183 (or 2179 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 28.

Adding to 153231122440 its reverse (44221132351), we get a palindrome (197452254791).

The spelling of 153231122440 in words is "one hundred fifty-three billion, two hundred thirty-one million, one hundred twenty-two thousand, four hundred forty".