131520016 has 20 divisors (see below), whose sum is σ = 255000172. Its totient is φ = 65713536.

The previous prime is 131519989. The next prime is 131520031. The reversal of 131520016 is 610025131.

It can be written as a sum of positive squares in 2 ways, for example, as 127599616 + 3920400 = 11296^2 + 1980^2 .

It is a junction number, because it is equal to n+sod(n) for n = 131519975 and 131520002.

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, 37306 + ... + 40678.

Almost surely, 2^131520016 is an apocalyptic number.

131520016 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

131520016 is a deficient number, since it is larger than the sum of its proper divisors (123480156).

131520016 is a wasteful number, since it uses less digits than its factorization.

131520016 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5818 (or 5812 counting only the distinct ones).

The product of its (nonzero) digits is 180, while the sum is 19.

The square root of 131520016 is about 11468.2176470452. The cubic root of 131520016 is about 508.5464390965.

Adding to 131520016 its reverse (610025131), we get a palindrome (741545147).

The spelling of 131520016 in words is "one hundred thirty-one million, five hundred twenty thousand, sixteen".