131552521 has 2 divisors, whose sum is σ = 131552522. Its totient is φ = 131552520.

The previous prime is 131552513. The next prime is 131552537. The reversal of 131552521 is 125255131.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 87516025 + 44036496 = 9355^2 + 6636^2 .

It is a cyclic number.

It is not a de Polignac number, because 131552521 - 2³ = 131552513 is a prime.

It is equal to p_7461241 and since 131552521 and 7461241 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (131552581) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65776260 + 65776261.

It is an arithmetic number, because the mean of its divisors is an integer number (65776261).

Almost surely, 2^131552521 is an apocalyptic number.

It is an amenable number.

131552521 is a deficient number, since it is larger than the sum of its proper divisors (1).

131552521 is an equidigital number, since it uses as much as digits as its factorization.

131552521 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1500, while the sum is 25.

The square root of 131552521 is about 11469.6347369914. The cubic root of 131552521 is about 508.5883311747.

The spelling of 131552521 in words is "one hundred thirty-one million, five hundred fifty-two thousand, five hundred twenty-one".