155503232 has 48 divisors (see below), whose sum is σ = 316034250. Its totient is φ = 76214784.

The previous prime is 155503171. The next prime is 155503259. The reversal of 155503232 is 232305551.

It can be written as a sum of positive squares in only one way, i.e., 117852736 + 37650496 = 10856^2 + 6136^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 445394 + ... + 445742.

Almost surely, 2^155503232 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 155503232, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (158017125).

155503232 is an abundant number, since it is smaller than the sum of its proper divisors (160531018).

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

155503232 is an frugal number, since it uses more digits than its factorization.

155503232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 481 (or 410 counting only the distinct ones).

The product of its (nonzero) digits is 4500, while the sum is 26.

The square root of 155503232 is about 12470.0935040600. The cubic root of 155503232 is about 537.7492416816.

Adding to 155503232 its reverse (232305551), we get a palindrome (387808783).

The spelling of 155503232 in words is "one hundred fifty-five million, five hundred three thousand, two hundred thirty-two".