155253440 has 28 divisors (see below), whose sum is σ = 369698016. Its totient is φ = 62101248.

The previous prime is 155253431. The next prime is 155253457. The reversal of 155253440 is 44352551.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 242264 + ... + 242903.

Almost surely, 2^155253440 is an apocalyptic number.

155253440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

155253440 is an abundant number, since it is smaller than the sum of its proper divisors (214444576).

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

155253440 is an equidigital number, since it uses as much as digits as its factorization.

155253440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 485184 (or 485174 counting only the distinct ones).

The product of its (nonzero) digits is 12000, while the sum is 29.

The square root of 155253440 is about 12460.0738360573. The cubic root of 155253440 is about 537.4611502478.

The spelling of 155253440 in words is "one hundred fifty-five million, two hundred fifty-three thousand, four hundred forty".