155533240 has 48 divisors (see below), whose sum is σ = 369371880. Its totient is φ = 58933440.

The previous prime is 155533229. The next prime is 155533241. The reversal of 155533240 is 42335551.

It is a junction number, because it is equal to n+sod(n) for n = 155533199 and 155533208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155533241) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9055 + ... + 19825.

Almost surely, 2^155533240 is an apocalyptic number.

155533240 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 155533240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (184685940).

155533240 is an abundant number, since it is smaller than the sum of its proper divisors (213838640).

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

155533240 is a wasteful number, since it uses less digits than its factorization.

155533240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10820 (or 10797 counting only the distinct ones).

The product of its (nonzero) digits is 9000, while the sum is 28.

The square root of 155533240 is about 12471.2966446958. The cubic root of 155533240 is about 537.7838299045.

Adding to 155533240 its reverse (42335551), we get a palindrome (197868791).

The spelling of 155533240 in words is "one hundred fifty-five million, five hundred thirty-three thousand, two hundred forty".