155312224 has 12 divisors (see below), whose sum is σ = 305771004. Its totient is φ = 77656096.

The previous prime is 155312219. The next prime is 155312233. The reversal of 155312224 is 422213551.

155312224 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2426722 + ... + 2426785.

It is an arithmetic number, because the mean of its divisors is an integer number (25480917).

Almost surely, 2^155312224 is an apocalyptic number.

It is an amenable number.

155312224 is a deficient number, since it is larger than the sum of its proper divisors (150458780).

155312224 is an equidigital number, since it uses as much as digits as its factorization.

155312224 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4853517 (or 4853509 counting only the distinct ones).

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

The square root of 155312224 is about 12462.4325073398. The cubic root of 155312224 is about 537.5289751101.

Adding to 155312224 its reverse (422213551), we get a palindrome (577525775).

The spelling of 155312224 in words is "one hundred fifty-five million, three hundred twelve thousand, two hundred twenty-four".