155243000 has 96 divisors (see below), whose sum is σ = 399606480. Its totient is φ = 56408000.

The previous prime is 155242999. The next prime is 155243017. The reversal of 155243000 is 342551.

It is a Harshad number since it is a multiple of its sum of digits (20).

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, 120359 + ... + 121641.

Almost surely, 2^155243000 is an apocalyptic number.

155243000 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 155243000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (199803240).

155243000 is an abundant number, since it is smaller than the sum of its proper divisors (244363480).

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

155243000 is a wasteful number, since it uses less digits than its factorization.

155243000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1326 (or 1301 counting only the distinct ones).

The product of its (nonzero) digits is 600, while the sum is 20.

The square root of 155243000 is about 12459.6548908868. The cubic root of 155243000 is about 537.4491028063.

Adding to 155243000 its reverse (342551), we get a palindrome (155585551).

The spelling of 155243000 in words is "one hundred fifty-five million, two hundred forty-three thousand".