100155330 has 144 divisors (see below), whose sum is σ = 303626232. Its totient is φ = 22809600.

The previous prime is 100155323. The next prime is 100155359. The reversal of 100155330 is 33551001.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 87216921 + 12938409 = 9339^2 + 3597^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 184860 + ... + 185400.

Almost surely, 2^100155330 is an apocalyptic number.

100155330 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 100155330, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (151813116).

100155330 is an abundant number, since it is smaller than the sum of its proper divisors (203470902).

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

100155330 is a wasteful number, since it uses less digits than its factorization.

100155330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 593 (or 579 counting only the distinct ones).

The product of its (nonzero) digits is 225, while the sum is 18.

The square root of 100155330 is about 10007.7634864139. The cubic root of 100155330 is about 464.3990850336.

The spelling of 100155330 in words is "one hundred million, one hundred fifty-five thousand, three hundred thirty".