155243500 has 48 divisors (see below), whose sum is σ = 340677792. Its totient is φ = 61800000.

The previous prime is 155243497. The next prime is 155243503. The reversal of 155243500 is 5342551.

It is an interprime number because it is at equal distance from previous prime (155243497) and next prime (155243503).

It is a Harshad number since it is a multiple of its sum of digits (25).

It is not an unprimeable number, because it can be changed into a prime (155243503) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 124882 + ... + 126118.

It is an arithmetic number, because the mean of its divisors is an integer number (7097454).

Almost surely, 2^155243500 is an apocalyptic number.

155243500 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 155243500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (170338896).

155243500 is an abundant number, since it is smaller than the sum of its proper divisors (185434292).

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

155243500 is a wasteful number, since it uses less digits than its factorization.

155243500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1507 (or 1495 counting only the distinct ones).

The product of its (nonzero) digits is 3000, while the sum is 25.

The square root of 155243500 is about 12459.6749556319. The cubic root of 155243500 is about 537.4496798034.

The spelling of 155243500 in words is "one hundred fifty-five million, two hundred forty-three thousand, five hundred".