4220155 has 8 divisors (see below), whose sum is σ = 5284512. Its totient is φ = 3229248.

The previous prime is 4220143. The next prime is 4220173. The reversal of 4220155 is 5510224.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 4220155 - 2¹¹ = 4218107 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 18234 + ... + 18463.

It is an arithmetic number, because the mean of its divisors is an integer number (660564).

Almost surely, 2^4220155 is an apocalyptic number.

4220155 is a deficient number, since it is larger than the sum of its proper divisors (1064357).

4220155 is a wasteful number, since it uses less digits than its factorization.

4220155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36725.

The product of its (nonzero) digits is 400, while the sum is 19.

The square root of 4220155 is about 2054.3015844807. The cubic root of 4220155 is about 161.6005374251.

Adding to 4220155 its reverse (5510224), we get a palindrome (9730379).

The spelling of 4220155 in words is "four million, two hundred twenty thousand, one hundred fifty-five".