155002500 has 135 divisors (see below), whose sum is σ = 495578083. Its totient is φ = 40836000.

The previous prime is 155002483. The next prime is 155002501. The reversal of 155002500 is 5200551.

The square root of 155002500 is 12450.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 2 ways, for example, as 12152196 + 142850304 = 3486^2 + 11952^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (155002501) by changing a digit.

It is a polite number, since it can be written in 44 ways as a sum of consecutive naturals, for example, 1867459 + ... + 1867541.

Almost surely, 2^155002500 is an apocalyptic number.

155002500 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

155002500 is the 12450-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 155002500

155002500 is an abundant number, since it is smaller than the sum of its proper divisors (340575583).

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

155002500 is an equidigital number, since it uses as much as digits as its factorization.

155002500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 196 (or 93 counting only the distinct ones).

The product of its (nonzero) digits is 250, while the sum is 18.

The cubic root of 155002500 is about 537.1714234818.

The spelling of 155002500 in words is "one hundred fifty-five million, two thousand, five hundred".