55252780 has 24 divisors (see below), whose sum is σ = 126579600. Its totient is φ = 20091840.

The previous prime is 55252753. The next prime is 55252793. The reversal of 55252780 is 8725255.

55252780 is digitally balanced in base 2 and base 9, because in such bases it contains all the possibile digits an equal number of times.

It is a super-3 number, since 3×55252780³ (a number of 24 digits) contains 333 as substring.

55252780 is strictly pandigital in base 9.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 125355 + ... + 125794.

It is an arithmetic number, because the mean of its divisors is an integer number (5274150).

Almost surely, 2^55252780 is an apocalyptic number.

It is an amenable number.

55252780 is an abundant number, since it is smaller than the sum of its proper divisors (71326820).

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

55252780 is a wasteful number, since it uses less digits than its factorization.

55252780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 251169 (or 251167 counting only the distinct ones).

The product of its (nonzero) digits is 28000, while the sum is 34.

The square root of 55252780 is about 7433.2213743437. The cubic root of 55252780 is about 380.8769681031.

The spelling of 55252780 in words is "fifty-five million, two hundred fifty-two thousand, seven hundred eighty".