43421155 has 4 divisors (see below), whose sum is σ = 52105392. Its totient is φ = 34736920.

The previous prime is 43421143. The next prime is 43421167. The reversal of 43421155 is 55112434.

It is a happy number.

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

It is an interprime number because it is at equal distance from previous prime (43421143) and next prime (43421167).

It is not a de Polignac number, because 43421155 - 2¹⁷ = 43290083 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4342111 + ... + 4342120.

It is an arithmetic number, because the mean of its divisors is an integer number (13026348).

Almost surely, 2^43421155 is an apocalyptic number.

43421155 is a deficient number, since it is larger than the sum of its proper divisors (8684237).

43421155 is an equidigital number, since it uses as much as digits as its factorization.

43421155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8684236.

The product of its digits is 2400, while the sum is 25.

The square root of 43421155 is about 6589.4730441819. The cubic root of 43421155 is about 351.4798700488.

Adding to 43421155 its reverse (55112434), we get a palindrome (98533589).

The spelling of 43421155 in words is "forty-three million, four hundred twenty-one thousand, one hundred fifty-five".