155565552 has 40 divisors (see below), whose sum is σ = 403438464. Its totient is φ = 51653824.

The previous prime is 155565511. The next prime is 155565569. The reversal of 155565552 is 255565551.

It is a self number, because there is not a number n which added to its sum of digits gives 155565552.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6463 + ... + 18785.

Almost surely, 2^155565552 is an apocalyptic number.

155565552 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

155565552 is an abundant number, since it is smaller than the sum of its proper divisors (247872912).

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

155565552 is a wasteful number, since it uses less digits than its factorization.

155565552 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12597 (or 12591 counting only the distinct ones).

The product of its digits is 187500, while the sum is 39.

The square root of 155565552 is about 12472.5920321319. The cubic root of 155565552 is about 537.8210688208.

Subtracting 155565552 from its reverse (255565551), we obtain a palindrome (99999999).

The spelling of 155565552 in words is "one hundred fifty-five million, five hundred sixty-five thousand, five hundred fifty-two".