131487321 has 8 divisors (see below), whose sum is σ = 200361664. Its totient is φ = 75135600.

The previous prime is 131487319. The next prime is 131487371. The reversal of 131487321 is 123784131.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 131487321 - 2¹ = 131487319 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (131487311) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3130630 + ... + 3130671.

It is an arithmetic number, because the mean of its divisors is an integer number (25045208).

Almost surely, 2^131487321 is an apocalyptic number.

It is an amenable number.

131487321 is a deficient number, since it is larger than the sum of its proper divisors (68874343).

131487321 is an equidigital number, since it uses as much as digits as its factorization.

131487321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6261311.

The product of its digits is 4032, while the sum is 30.

The square root of 131487321 is about 11466.7920971822. The cubic root of 131487321 is about 508.5042951849.

The spelling of 131487321 in words is "one hundred thirty-one million, four hundred eighty-seven thousand, three hundred twenty-one".