155542200 has 96 divisors (see below), whose sum is σ = 526037760. Its totient is φ = 37705600.

The previous prime is 155542199. The next prime is 155542207. The reversal of 155542200 is 2245551.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155542207) 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, 5184 + ... + 18383.

It is an arithmetic number, because the mean of its divisors is an integer number (5479560).

Almost surely, 2^155542200 is an apocalyptic number.

155542200 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

155542200 is an abundant number, since it is smaller than the sum of its proper divisors (370495560).

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

155542200 is a wasteful number, since it uses less digits than its factorization.

155542200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23597 (or 23588 counting only the distinct ones).

The product of its (nonzero) digits is 2000, while the sum is 24.

The square root of 155542200 is about 12471.6558643991. The cubic root of 155542200 is about 537.7941566373.

Adding to 155542200 its reverse (2245551), we get a palindrome (157787751).

The spelling of 155542200 in words is "one hundred fifty-five million, five hundred forty-two thousand, two hundred".