155280280 has 16 divisors (see below), whose sum is σ = 349380720. Its totient is φ = 62112096.

The previous prime is 155280263. The next prime is 155280283. The reversal of 155280280 is 82082551.

It is a super-2 number, since 2×155280280² = 48223930713756800, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155280283) by changing a digit.

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, 1940964 + ... + 1941043.

It is an arithmetic number, because the mean of its divisors is an integer number (21836295).

Almost surely, 2^155280280 is an apocalyptic number.

155280280 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

155280280 is an abundant number, since it is smaller than the sum of its proper divisors (194100440).

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

155280280 is a wasteful number, since it uses less digits than its factorization.

155280280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3882018 (or 3882014 counting only the distinct ones).

The product of its (nonzero) digits is 6400, while the sum is 31.

The square root of 155280280 is about 12461.1508296786. The cubic root of 155280280 is about 537.4921203099.

The spelling of 155280280 in words is "one hundred fifty-five million, two hundred eighty thousand, two hundred eighty".