155252240 has 160 divisors (see below), whose sum is σ = 435722112. Its totient is φ = 50688000.

The previous prime is 155252183. The next prime is 155252243. The reversal of 155252240 is 42252551.

155252240 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (26).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155252243) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 468875 + ... + 469205.

Almost surely, 2^155252240 is an apocalyptic number.

155252240 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 155252240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (217861056).

155252240 is an abundant number, since it is smaller than the sum of its proper divisors (280469872).

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

155252240 is a wasteful number, since it uses less digits than its factorization.

155252240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 409 (or 403 counting only the distinct ones).

The product of its (nonzero) digits is 4000, while the sum is 26.

The square root of 155252240 is about 12460.0256821565. The cubic root of 155252240 is about 537.4597655119.

The spelling of 155252240 in words is "one hundred fifty-five million, two hundred fifty-two thousand, two hundred forty".