155136240 has 120 divisors (see below), whose sum is σ = 595447008. Its totient is φ = 35458560.

The previous prime is 155136239. The next prime is 155136263. The reversal of 155136240 is 42631551.

155136240 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (120).

It is a super-2 number, since 2×155136240² = 48134505922675200, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 10351 + ... + 20430.

Almost surely, 2^155136240 is an apocalyptic number.

155136240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

155136240 is an abundant number, since it is smaller than the sum of its proper divisors (440310768).

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

155136240 is a wasteful number, since it uses less digits than its factorization.

155136240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30807 (or 30798 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 27.

The square root of 155136240 is about 12455.3699262607. The cubic root of 155136240 is about 537.3258740099.

Adding to 155136240 its reverse (42631551), we get a palindrome (197767791).

The spelling of 155136240 in words is "one hundred fifty-five million, one hundred thirty-six thousand, two hundred forty".