155996250 has 80 divisors (see below), whose sum is σ = 412967808. Its totient is φ = 39136000.

The previous prime is 155996237. The next prime is 155996261. The reversal of 155996250 is 52699551.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 62527 + ... + 64973.

Almost surely, 2^155996250 is an apocalyptic number.

155996250 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 155996250, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (206483904).

155996250 is an abundant number, since it is smaller than the sum of its proper divisors (256971558).

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

155996250 is a wasteful number, since it uses less digits than its factorization.

155996250 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2489 (or 2474 counting only the distinct ones).

The product of its (nonzero) digits is 121500, while the sum is 42.

The square root of 155996250 is about 12489.8458757504. The cubic root of 155996250 is about 538.3169477025.

The spelling of 155996250 in words is "one hundred fifty-five million, nine hundred ninety-six thousand, two hundred fifty".