155342550 has 96 divisors (see below), whose sum is σ = 433972224. Its totient is φ = 36432000.

The previous prime is 155342543. The next prime is 155342573. The reversal of 155342550 is 55243551.

It is a happy number.

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

It is a nialpdrome in base 15.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 49632 + ... + 52668.

It is an arithmetic number, because the mean of its divisors is an integer number (4520544).

Almost surely, 2^155342550 is an apocalyptic number.

155342550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 155342550, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (216986112).

155342550 is an abundant number, since it is smaller than the sum of its proper divisors (278629674).

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

155342550 is a wasteful number, since it uses less digits than its factorization.

155342550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3094 (or 3089 counting only the distinct ones).

The product of its (nonzero) digits is 15000, while the sum is 30.

The square root of 155342550 is about 12463.6491446125. The cubic root of 155342550 is about 537.5639584969.

The spelling of 155342550 in words is "one hundred fifty-five million, three hundred forty-two thousand, five hundred fifty".