155542800 has 120 divisors (see below), whose sum is σ = 569465536. Its totient is φ = 35550720.

The previous prime is 155542799. The next prime is 155542801. The reversal of 155542800 is 8245551.

It is an interprime number because it is at equal distance from previous prime (155542799) and next prime (155542801).

It is a tau number, because it is divible by the number of its divisors (120).

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

It is not an unprimeable number, because it can be changed into a prime (155542801) 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, 859 + ... + 17658.

Almost surely, 2^155542800 is an apocalyptic number.

155542800 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 155542800, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (284732768).

155542800 is an abundant number, since it is smaller than the sum of its proper divisors (413922736).

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

155542800 is a wasteful number, since it uses less digits than its factorization.

155542800 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18545 (or 18534 counting only the distinct ones).

The product of its (nonzero) digits is 8000, while the sum is 30.

The square root of 155542800 is about 12471.6799189203. The cubic root of 155542800 is about 537.7948481454.

The spelling of 155542800 in words is "one hundred fifty-five million, five hundred forty-two thousand, eight hundred".