15531125142 has 16 divisors (see below), whose sum is σ = 33451654320. Its totient is φ = 4778807712.

The previous prime is 15531125041. The next prime is 15531125161. The reversal of 15531125142 is 24152113551.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 99558417 + ... + 99558572.

It is an arithmetic number, because the mean of its divisors is an integer number (2090728395).

Almost surely, 2^15531125142 is an apocalyptic number.

15531125142 is an abundant number, since it is smaller than the sum of its proper divisors (17920529178).

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

15531125142 is a wasteful number, since it uses less digits than its factorization.

15531125142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 199117007.

The product of its digits is 6000, while the sum is 30.

Adding to 15531125142 its reverse (24152113551), we get a palindrome (39683238693).

The spelling of 15531125142 in words is "fifteen billion, five hundred thirty-one million, one hundred twenty-five thousand, one hundred forty-two".