43672131 has 6 divisors (see below), whose sum is σ = 63081980. Its totient is φ = 29114748.

The previous prime is 43672121. The next prime is 43672169. The reversal of 43672131 is 13127634.

It is not a de Polignac number, because 43672131 - 2⁶ = 43672067 is a prime.

It is a super-2 number, since 2×43672131² = 3814510052162322, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 43672095 and 43672104.

It is not an unprimeable number, because it can be changed into a prime (43672121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2426221 + ... + 2426238.

Almost surely, 2^43672131 is an apocalyptic number.

43672131 is a deficient number, since it is larger than the sum of its proper divisors (19409849).

43672131 is a wasteful number, since it uses less digits than its factorization.

43672131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4852465 (or 4852462 counting only the distinct ones).

The product of its digits is 3024, while the sum is 27.

The square root of 43672131 is about 6608.4893129973. The cubic root of 43672131 is about 352.1557586972.

Adding to 43672131 its reverse (13127634), we get a palindrome (56799765).

The spelling of 43672131 in words is "forty-three million, six hundred seventy-two thousand, one hundred thirty-one".