131552515 has 4 divisors (see below), whose sum is σ = 157863024. Its totient is φ = 105242008.

The previous prime is 131552513. The next prime is 131552521. The reversal of 131552515 is 515255131.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 131552515 - 2¹ = 131552513 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (131552513) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13155247 + ... + 13155256.

It is an arithmetic number, because the mean of its divisors is an integer number (39465756).

Almost surely, 2^131552515 is an apocalyptic number.

131552515 is a deficient number, since it is larger than the sum of its proper divisors (26310509).

131552515 is an equidigital number, since it uses as much as digits as its factorization.

131552515 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26310508.

The product of its digits is 3750, while the sum is 28.

The square root of 131552515 is about 11469.6344754312. The cubic root of 131552515 is about 508.5883234426.

The spelling of 131552515 in words is "one hundred thirty-one million, five hundred fifty-two thousand, five hundred fifteen".