43121255 has 4 divisors (see below), whose sum is σ = 51745512. Its totient is φ = 34497000.

The previous prime is 43121233. The next prime is 43121257. The reversal of 43121255 is 55212134.

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

It is not a de Polignac number, because 43121255 - 2¹⁸ = 42859111 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 43121255.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43121257) 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, 4312121 + ... + 4312130.

It is an arithmetic number, because the mean of its divisors is an integer number (12936378).

Almost surely, 2^43121255 is an apocalyptic number.

43121255 is a deficient number, since it is larger than the sum of its proper divisors (8624257).

43121255 is an equidigital number, since it uses as much as digits as its factorization.

43121255 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8624256.

The product of its digits is 1200, while the sum is 23.

The square root of 43121255 is about 6566.6776226643. The cubic root of 43121255 is about 350.6688028266.

Adding to 43121255 its reverse (55212134), we get a palindrome (98333389).

The spelling of 43121255 in words is "forty-three million, one hundred twenty-one thousand, two hundred fifty-five".