131451559 has 4 divisors (see below), whose sum is σ = 134508616. Its totient is φ = 128394504.

The previous prime is 131451553. The next prime is 131451569. The reversal of 131451559 is 955154131.

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 131451559 - 2¹⁷ = 131320487 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131451553) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1528464 + ... + 1528549.

It is an arithmetic number, because the mean of its divisors is an integer number (33627154).

Almost surely, 2^131451559 is an apocalyptic number.

131451559 is a deficient number, since it is larger than the sum of its proper divisors (3057057).

131451559 is an equidigital number, since it uses as much as digits as its factorization.

131451559 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3057056.

The product of its digits is 13500, while the sum is 34.

The square root of 131451559 is about 11465.2326186606. The cubic root of 131451559 is about 508.4581899042.

The spelling of 131451559 in words is "one hundred thirty-one million, four hundred fifty-one thousand, five hundred fifty-nine".