223420155 has 48 divisors (see below), whose sum is σ = 417376800. Its totient is φ = 101756928.

The previous prime is 223420151. The next prime is 223420157. The reversal of 223420155 is 551024322.

It is not a de Polignac number, because 223420155 - 2² = 223420151 is a prime.

It is not an unprimeable number, because it can be changed into a prime (223420151) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 329677 + ... + 330353.

It is an arithmetic number, because the mean of its divisors is an integer number (8695350).

Almost surely, 2^223420155 is an apocalyptic number.

223420155 is a deficient number, since it is larger than the sum of its proper divisors (193956645).

223420155 is a wasteful number, since it uses less digits than its factorization.

223420155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1148 (or 1141 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 24.

The square root of 223420155 is about 14947.2457329101. The cubic root of 223420155 is about 606.7933085386.

Adding to 223420155 its reverse (551024322), we get a palindrome (774444477).

The spelling of 223420155 in words is "two hundred twenty-three million, four hundred twenty thousand, one hundred fifty-five".