131465643 has 4 divisors (see below), whose sum is σ = 175287528. Its totient is φ = 87643760.

The previous prime is 131465603. The next prime is 131465681. The reversal of 131465643 is 346564131.

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 131465643 - 2¹⁶ = 131400107 is a prime.

It is a super-3 number, since 3×131465643³ (a number of 25 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (131465603) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21910938 + ... + 21910943.

It is an arithmetic number, because the mean of its divisors is an integer number (43821882).

Almost surely, 2^131465643 is an apocalyptic number.

131465643 is a deficient number, since it is larger than the sum of its proper divisors (43821885).

131465643 is an equidigital number, since it uses as much as digits as its factorization.

131465643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43821884.

The product of its digits is 25920, while the sum is 33.

The square root of 131465643 is about 11465.8468069306. The cubic root of 131465643 is about 508.4763483535.

The spelling of 131465643 in words is "one hundred thirty-one million, four hundred sixty-five thousand, six hundred forty-three".