155625000 has 128 divisors (see below), whose sum is σ = 492186240. Its totient is φ = 41000000.

The previous prime is 155624999. The next prime is 155625007. The reversal of 155625000 is 526551.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is not an unprimeable number, because it can be changed into a prime (155625007) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 1874959 + ... + 1875041.

It is an arithmetic number, because the mean of its divisors is an integer number (3845205).

Almost surely, 2^155625000 is an apocalyptic number.

155625000 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 155625000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (246093120).

155625000 is an abundant number, since it is smaller than the sum of its proper divisors (336561240).

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

155625000 is an frugal number, since it uses more digits than its factorization.

155625000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 127 (or 93 counting only the distinct ones).

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

The square root of 155625000 is about 12474.9749498746. The cubic root of 155625000 is about 537.8895679512.

The spelling of 155625000 in words is "one hundred fifty-five million, six hundred twenty-five thousand".