43131001 has 4 divisors (see below), whose sum is σ = 43156900. Its totient is φ = 43105104.

The previous prime is 43130987. The next prime is 43131031. The reversal of 43131001 is 10013134.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 35093776 + 8037225 = 5924^2 + 2835^2 .

It is a cyclic number.

It is not a de Polignac number, because 43131001 - 2²¹ = 41033849 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (43131031) 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, 10266 + ... + 13843.

It is an arithmetic number, because the mean of its divisors is an integer number (10789225).

Almost surely, 2^43131001 is an apocalyptic number.

It is an amenable number.

43131001 is a deficient number, since it is larger than the sum of its proper divisors (25899).

43131001 is a wasteful number, since it uses less digits than its factorization.

43131001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25898.

The product of its (nonzero) digits is 36, while the sum is 13.

The square root of 43131001 is about 6567.4196607191. The cubic root of 43131001 is about 350.6952195029.

Adding to 43131001 its reverse (10013134), we get a palindrome (53144135).

It can be divided in two parts, 43 and 131001, that added together give a square (131044 = 362²).

The spelling of 43131001 in words is "forty-three million, one hundred thirty-one thousand, one".