43872101 has 16 divisors (see below), whose sum is σ = 55104000. Its totient is φ = 34708464.

The previous prime is 43872079. The next prime is 43872131. The reversal of 43872101 is 10127834.

It is not a de Polignac number, because 43872101 - 2¹⁰ = 43871077 is a prime.

It is a super-2 number, since 2×43872101² = 3849522492308402, which contains 22 as substring.

It is an alternating number because its digits alternate between even and odd.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43872131) 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, 461 + ... + 9378.

It is an arithmetic number, because the mean of its divisors is an integer number (3444000).

Almost surely, 2^43872101 is an apocalyptic number.

It is an amenable number.

43872101 is a deficient number, since it is larger than the sum of its proper divisors (11231899).

43872101 is an equidigital number, since it uses as much as digits as its factorization.

43872101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9873 (or 9859 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 26.

The square root of 43872101 is about 6623.6018147229. The cubic root of 43872101 is about 352.6924348739.

Adding to 43872101 its reverse (10127834), we get a palindrome (53999935).

The spelling of 43872101 in words is "forty-three million, eight hundred seventy-two thousand, one hundred one".