131432401 has 4 divisors (see below), whose sum is σ = 131457892. Its totient is φ = 131406912.

The previous prime is 131432383. The next prime is 131432407. The reversal of 131432401 is 104234131.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 104234131 = 9157 ⋅11383.

It can be written as a sum of positive squares in 2 ways, for example, as 82446400 + 48986001 = 9080^2 + 6999^2 .

It is a cyclic number.

It is not a de Polignac number, because 131432401 - 2¹⁷ = 131301329 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (131432407) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1980 + ... + 16333.

It is an arithmetic number, because the mean of its divisors is an integer number (32864473).

Almost surely, 2^131432401 is an apocalyptic number.

It is an amenable number.

131432401 is a deficient number, since it is larger than the sum of its proper divisors (25491).

131432401 is an equidigital number, since it uses as much as digits as its factorization.

131432401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25490.

The product of its (nonzero) digits is 288, while the sum is 19.

The square root of 131432401 is about 11464.3971058229. The cubic root of 131432401 is about 508.4334874832.

Adding to 131432401 its reverse (104234131), we get a palindrome (235666532).

The spelling of 131432401 in words is "one hundred thirty-one million, four hundred thirty-two thousand, four hundred one".