155211100 has 36 divisors (see below), whose sum is σ = 367429608. Its totient is φ = 56440000.

The previous prime is 155211073. The next prime is 155211101. The reversal of 155211100 is 1112551.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155211101) 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 11 ways as a sum of consecutive naturals, for example, 69451 + ... + 71650.

It is an arithmetic number, because the mean of its divisors is an integer number (10206378).

Almost surely, 2^155211100 is an apocalyptic number.

155211100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

155211100 is an abundant number, since it is smaller than the sum of its proper divisors (212218508).

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

155211100 is a wasteful number, since it uses less digits than its factorization.

155211100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 141126 (or 141119 counting only the distinct ones).

The product of its (nonzero) digits is 50, while the sum is 16.

The square root of 155211100 is about 12458.3746933539. The cubic root of 155211100 is about 537.4122878327.

Adding to 155211100 its reverse (1112551), we get a palindrome (156323651).

The spelling of 155211100 in words is "one hundred fifty-five million, two hundred eleven thousand, one hundred".