155231250 has 96 divisors (see below), whose sum is σ = 411723648. Its totient is φ = 38880000.

The previous prime is 155231227. The next prime is 155231261. The reversal of 155231250 is 52132551.

It is a happy number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 155231250.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 318507 + ... + 318993.

It is an arithmetic number, because the mean of its divisors is an integer number (4288788).

Almost surely, 2^155231250 is an apocalyptic number.

155231250 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 155231250, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (205861824).

155231250 is an abundant number, since it is smaller than the sum of its proper divisors (256492398).

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

155231250 is an equidigital number, since it uses as much as digits as its factorization.

155231250 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 534 (or 514 counting only the distinct ones).

The product of its (nonzero) digits is 1500, while the sum is 24.

The square root of 155231250 is about 12459.1833600762. The cubic root of 155231250 is about 537.4355430188.

The spelling of 155231250 in words is "one hundred fifty-five million, two hundred thirty-one thousand, two hundred fifty".