155155240 has 64 divisors (see below), whose sum is σ = 367234560. Its totient is φ = 58882560.

The previous prime is 155155237. The next prime is 155155241. The reversal of 155155240 is 42551551.

It is a junction number, because it is equal to n+sod(n) for n = 155155199 and 155155208.

It is not an unprimeable number, because it can be changed into a prime (155155241) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 125425 + ... + 126655.

It is an arithmetic number, because the mean of its divisors is an integer number (5738040).

Almost surely, 2^155155240 is an apocalyptic number.

155155240 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 155155240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (183617280).

155155240 is an abundant number, since it is smaller than the sum of its proper divisors (212079320).

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

155155240 is a wasteful number, since it uses less digits than its factorization.

155155240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1402 (or 1398 counting only the distinct ones).

The product of its (nonzero) digits is 5000, while the sum is 28.

The square root of 155155240 is about 12456.1326261404. The cubic root of 155155240 is about 537.3478090842.

The spelling of 155155240 in words is "one hundred fifty-five million, one hundred fifty-five thousand, two hundred forty".