155533200240 has 320 divisors, whose sum is σ = 531248855040. Its totient is φ = 37329761280.

The previous prime is 155533200239. The next prime is 155533200301. The reversal of 155533200240 is 42002335551.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 155533200198 and 155533200207.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 133733899 + ... + 133735061.

It is an arithmetic number, because the mean of its divisors is an integer number (1660152672).

Almost surely, 2^155533200240 is an apocalyptic number.

155533200240 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 155533200240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (265624427520).

155533200240 is an abundant number, since it is smaller than the sum of its proper divisors (375715654800).

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

155533200240 is a wasteful number, since it uses less digits than its factorization.

155533200240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1652 (or 1646 counting only the distinct ones).

The product of its (nonzero) digits is 18000, while the sum is 30.

Adding to 155533200240 its reverse (42002335551), we get a palindrome (197535535791).

The spelling of 155533200240 in words is "one hundred fifty-five billion, five hundred thirty-three million, two hundred thousand, two hundred forty".