155287200 has 144 divisors (see below), whose sum is σ = 511842240. Its totient is φ = 40888320.

The previous prime is 155287183. The next prime is 155287243. The reversal of 155287200 is 2782551.

It is a super-2 number, since 2×155287200² = 48228228967680000, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30).

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, 213237 + ... + 213963.

It is an arithmetic number, because the mean of its divisors is an integer number (3554460).

Almost surely, 2^155287200 is an apocalyptic number.

155287200 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 155287200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (255921120).

155287200 is an abundant number, since it is smaller than the sum of its proper divisors (356555040).

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

155287200 is a wasteful number, since it uses less digits than its factorization.

155287200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 839 (or 826 counting only the distinct ones).

The product of its (nonzero) digits is 5600, while the sum is 30.

The square root of 155287200 is about 12461.4284895432. The cubic root of 155287200 is about 537.5001045610.

The spelling of 155287200 in words is "one hundred fifty-five million, two hundred eighty-seven thousand, two hundred".