155120204 has 12 divisors (see below), whose sum is σ = 276061800. Its totient is φ = 76245408.

The previous prime is 155120201. The next prime is 155120219. The reversal of 155120204 is 402021551.

It is not an unprimeable number, because it can be changed into a prime (155120201) 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, 328409 + ... + 328880.

It is an arithmetic number, because the mean of its divisors is an integer number (23005150).

Almost surely, 2^155120204 is an apocalyptic number.

It is an amenable number.

155120204 is a deficient number, since it is larger than the sum of its proper divisors (120941596).

155120204 is a wasteful number, since it uses less digits than its factorization.

155120204 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 657352 (or 657350 counting only the distinct ones).

The product of its (nonzero) digits is 400, while the sum is 20.

The square root of 155120204 is about 12454.7261712171. The cubic root of 155120204 is about 537.3073594135.

Adding to 155120204 its reverse (402021551), we get a palindrome (557141755).

The spelling of 155120204 in words is "one hundred fifty-five million, one hundred twenty thousand, two hundred four".