155011200 has 192 divisors, whose sum is σ = 520338720. Its totient is φ = 40550400.

The previous prime is 155011169. The next prime is 155011243. The reversal of 155011200 is 2110551.

It is a tau number, because it is divible by the number of its divisors (192).

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 155011200.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 643080 + ... + 643320.

Almost surely, 2^155011200 is an apocalyptic number.

155011200 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 155011200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (260169360).

155011200 is an abundant number, since it is smaller than the sum of its proper divisors (365327520).

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

155011200 is a wasteful number, since it uses less digits than its factorization.

155011200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 335 (or 318 counting only the distinct ones).

The product of its (nonzero) digits is 50, while the sum is 15.

The square root of 155011200 is about 12450.3493926877. The cubic root of 155011200 is about 537.1814734358.

Adding to 155011200 its reverse (2110551), we get a palindrome (157121751).

The spelling of 155011200 in words is "one hundred fifty-five million, eleven thousand, two hundred".