155554240 has 56 divisors (see below), whose sum is σ = 375544080. Its totient is φ = 61360128.

The previous prime is 155554237. The next prime is 155554261. The reversal of 155554240 is 42455551.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20031 + ... + 26689.

Almost surely, 2^155554240 is an apocalyptic number.

155554240 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 155554240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (187772040).

155554240 is an abundant number, since it is smaller than the sum of its proper divisors (219989840).

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

155554240 is an equidigital number, since it uses as much as digits as its factorization.

155554240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6749 (or 6739 counting only the distinct ones).

The product of its (nonzero) digits is 20000, while the sum is 31.

The square root of 155554240 is about 12472.1385495832. The cubic root of 155554240 is about 537.8080325598.

The spelling of 155554240 in words is "one hundred fifty-five million, five hundred fifty-four thousand, two hundred forty".