15531143145 has 48 divisors (see below), whose sum is σ = 29314182528. Its totient is φ = 6999928320.

The previous prime is 15531143123. The next prime is 15531143167. The reversal of 15531143145 is 54134113551.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (15531143123) and next prime (15531143167).

It is not a de Polignac number, because 15531143145 - 2⁵ = 15531143113 is a prime.

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 47 ways as a sum of consecutive naturals, for example, 96624 + ... + 200993.

It is an arithmetic number, because the mean of its divisors is an integer number (610712136).

Almost surely, 2^15531143145 is an apocalyptic number.

15531143145 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

15531143145 is a deficient number, since it is larger than the sum of its proper divisors (13783039383).

15531143145 is a wasteful number, since it uses less digits than its factorization.

15531143145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 297710 (or 297703 counting only the distinct ones).

The product of its digits is 18000, while the sum is 33.

Adding to 15531143145 its reverse (54134113551), we get a palindrome (69665256696).

The spelling of 15531143145 in words is "fifteen billion, five hundred thirty-one million, one hundred forty-three thousand, one hundred forty-five".