131443401 has 16 divisors (see below), whose sum is σ = 177666048. Its totient is φ = 86432400.

The previous prime is 131443397. The next prime is 131443409. The reversal of 131443401 is 104344131.

It is not a de Polignac number, because 131443401 - 2² = 131443397 is a prime.

It is not an unprimeable number, because it can be changed into a prime (131443409) 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, 86236 + ... + 87746.

It is an arithmetic number, because the mean of its divisors is an integer number (11104128).

Almost surely, 2^131443401 is an apocalyptic number.

It is an amenable number.

131443401 is a deficient number, since it is larger than the sum of its proper divisors (46222647).

131443401 is a wasteful number, since it uses less digits than its factorization.

131443401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1892.

The product of its (nonzero) digits is 576, while the sum is 21.

The square root of 131443401 is about 11464.8768419028. The cubic root of 131443401 is about 508.4476712316.

Adding to 131443401 its reverse (104344131), we get a palindrome (235787532).

The spelling of 131443401 in words is "one hundred thirty-one million, four hundred forty-three thousand, four hundred one".