155553900 has 144 divisors (see below), whose sum is σ = 467470080. Its totient is φ = 39916800.

The previous prime is 155553863. The next prime is 155553901. The reversal of 155553900 is 9355551.

It is not an unprimeable number, because it can be changed into a prime (155553901) by changing a digit.

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 47 ways as a sum of consecutive naturals, for example, 1427046 + ... + 1427154.

It is an arithmetic number, because the mean of its divisors is an integer number (3246320).

Almost surely, 2^155553900 is an apocalyptic number.

155553900 is a gapful number since it is divisible by the number (10) 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 155553900, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (233735040).

155553900 is an abundant number, since it is smaller than the sum of its proper divisors (311916180).

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

155553900 is a wasteful number, since it uses less digits than its factorization.

155553900 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 264 (or 257 counting only the distinct ones).

The product of its (nonzero) digits is 16875, while the sum is 33.

The square root of 155553900 is about 12472.1249191948. The cubic root of 155553900 is about 537.8076407247.

It can be divided in two parts, 1555 and 53900, that added together give a palindrome (55455).

The spelling of 155553900 in words is "one hundred fifty-five million, five hundred fifty-three thousand, nine hundred".