155287552 has 64 divisors (see below), whose sum is σ = 355461840. Its totient is φ = 66453504.

The previous prime is 155287549. The next prime is 155287553. The reversal of 155287552 is 255782551.

It is a tau number, because it is divible by the number of its divisors (64).

It is a super-2 number, since 2×155287552² = 48228447612305408, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155287553) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 229038 + ... + 229714.

Almost surely, 2^155287552 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 155287552, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (177730920).

155287552 is an abundant number, since it is smaller than the sum of its proper divisors (200174288).

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

155287552 is an frugal number, since it uses more digits than its factorization.

155287552 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 714 (or 686 counting only the distinct ones).

The product of its digits is 140000, while the sum is 40.

The square root of 155287552 is about 12461.4426131167. The cubic root of 155287552 is about 537.5005106900.

The spelling of 155287552 in words is "one hundred fifty-five million, two hundred eighty-seven thousand, five hundred fifty-two".