155532100 has 72 divisors (see below), whose sum is σ = 359004800. Its totient is φ = 58320000.

The previous prime is 155532089. The next prime is 155532101. The reversal of 155532100 is 1235551.

It is not an unprimeable number, because it can be changed into a prime (155532101) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 206725 + ... + 207475.

Almost surely, 2^155532100 is an apocalyptic number.

155532100 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 155532100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (179502400).

155532100 is an abundant number, since it is smaller than the sum of its proper divisors (203472700).

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

155532100 is a wasteful number, since it uses less digits than its factorization.

155532100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 893 (or 886 counting only the distinct ones).

The product of its (nonzero) digits is 750, while the sum is 22.

The square root of 155532100 is about 12471.2509396612. The cubic root of 155532100 is about 537.7825159838.

Adding to 155532100 its reverse (1235551), we get a palindrome (156767651).

The spelling of 155532100 in words is "one hundred fifty-five million, five hundred thirty-two thousand, one hundred".