15131306530 has 8 divisors (see below), whose sum is σ = 27236351772. Its totient is φ = 6052522608.

The previous prime is 15131306479. The next prime is 15131306551. The reversal of 15131306530 is 3560313151.

It can be written as a sum of positive squares in 2 ways, for example, as 15097282641 + 34023889 = 122871^2 + 5833^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 756565317 + ... + 756565336.

Almost surely, 2^15131306530 is an apocalyptic number.

15131306530 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

15131306530 is a deficient number, since it is larger than the sum of its proper divisors (12105045242).

15131306530 is a wasteful number, since it uses less digits than its factorization.

15131306530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1513130660.

The product of its (nonzero) digits is 4050, while the sum is 28.

Adding to 15131306530 its reverse (3560313151), we get a palindrome (18691619681).

The spelling of 15131306530 in words is "fifteen billion, one hundred thirty-one million, three hundred six thousand, five hundred thirty".