155525000 has 48 divisors (see below), whose sum is σ = 364546980. Its totient is φ = 62200000.

The previous prime is 155524991. The next prime is 155525081. The reversal of 155525000 is 525551.

It can be written as a sum of positive squares in 6 ways, for example, as 56761156 + 98763844 = 7534^2 + 9938^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 21890 + ... + 28110.

Almost surely, 2^155525000 is an apocalyptic number.

155525000 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 155525000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (182273490).

155525000 is an abundant number, since it is smaller than the sum of its proper divisors (209021980).

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

155525000 is an frugal number, since it uses more digits than its factorization.

155525000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6252 (or 6228 counting only the distinct ones).

The product of its (nonzero) digits is 1250, while the sum is 23.

The square root of 155525000 is about 12470.9662817281. The cubic root of 155525000 is about 537.7743326485.

The spelling of 155525000 in words is "one hundred fifty-five million, five hundred twenty-five thousand".