131505457 has 2 divisors, whose sum is σ = 131505458. Its totient is φ = 131505456.

The previous prime is 131505383. The next prime is 131505469. The reversal of 131505457 is 754505131.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 128232976 + 3272481 = 11324^2 + 1809^2 .

It is a cyclic number.

It is not a de Polignac number, because 131505457 - 2¹¹ = 131503409 is a prime.

It is not a weakly prime, because it can be changed into another prime (131505757) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65752728 + 65752729.

It is an arithmetic number, because the mean of its divisors is an integer number (65752729).

Almost surely, 2^131505457 is an apocalyptic number.

It is an amenable number.

131505457 is a deficient number, since it is larger than the sum of its proper divisors (1).

131505457 is an equidigital number, since it uses as much as digits as its factorization.

131505457 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10500, while the sum is 31.

The square root of 131505457 is about 11467.5828752183. The cubic root of 131505457 is about 508.5276733830.

The spelling of 131505457 in words is "one hundred thirty-one million, five hundred five thousand, four hundred fifty-seven".