155523312 has 120 divisors (see below), whose sum is σ = 500119776. Its totient is φ = 44195328.

The previous prime is 155523307. The next prime is 155523337. The reversal of 155523312 is 213325551.

It is a happy number.

It is a congruent 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 23 ways as a sum of consecutive naturals, for example, 278938 + ... + 279494.

Almost surely, 2^155523312 is an apocalyptic number.

155523312 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 155523312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (250059888).

155523312 is an abundant number, since it is smaller than the sum of its proper divisors (344596464).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

155523312 is a wasteful number, since it uses less digits than its factorization.

155523312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 855 (or 846 counting only the distinct ones).

The product of its digits is 4500, while the sum is 27.

The square root of 155523312 is about 12470.8986043509. The cubic root of 155523312 is about 537.7723870527.

Adding to 155523312 its reverse (213325551), we get a palindrome (368848863).

The spelling of 155523312 in words is "one hundred fifty-five million, five hundred twenty-three thousand, three hundred twelve".