131467721 has 16 divisors (see below), whose sum is σ = 164830848. Its totient is φ = 101865600.

The previous prime is 131467711. The next prime is 131467723. The reversal of 131467721 is 127764131.

It is a cyclic number.

It is not a de Polignac number, because 131467721 - 2¹⁴ = 131451337 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (131467723) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9221 + ... + 18653.

It is an arithmetic number, because the mean of its divisors is an integer number (10301928).

Almost surely, 2^131467721 is an apocalyptic number.

131467721 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

131467721 is a deficient number, since it is larger than the sum of its proper divisors (33363127).

131467721 is a wasteful number, since it uses less digits than its factorization.

131467721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9632.

The product of its digits is 7056, while the sum is 32.

The square root of 131467721 is about 11465.9374235167. The cubic root of 131467721 is about 508.4790274015.

The spelling of 131467721 in words is "one hundred thirty-one million, four hundred sixty-seven thousand, seven hundred twenty-one".