15530231340 has 432 divisors, whose sum is σ = 55034834400. Its totient is φ = 3530022912.

The previous prime is 15530231329. The next prime is 15530231369. The reversal of 15530231340 is 4313203551.

15530231340 is a `hidden beast` number, since 1 + 5 + 5 + 302 + 313 + 40 = 666.

15530231340 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 30511006 + ... + 30511514.

It is an arithmetic number, because the mean of its divisors is an integer number (127395450).

Almost surely, 2^15530231340 is an apocalyptic number.

15530231340 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 15530231340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27517417200).

15530231340 is an abundant number, since it is smaller than the sum of its proper divisors (39504603060).

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

15530231340 is a wasteful number, since it uses less digits than its factorization.

15530231340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 626 (or 608 counting only the distinct ones).

The product of its (nonzero) digits is 5400, while the sum is 27.

Adding to 15530231340 its reverse (4313203551), we get a palindrome (19843434891).

The spelling of 15530231340 in words is "fifteen billion, five hundred thirty million, two hundred thirty-one thousand, three hundred forty".