55229980 has 24 divisors (see below), whose sum is σ = 124905312. Its totient is φ = 20392512.

The previous prime is 55229971. The next prime is 55229981. The reversal of 55229980 is 8992255.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55229981) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 105952 + ... + 106471.

It is an arithmetic number, because the mean of its divisors is an integer number (5204388).

Almost surely, 2^55229980 is an apocalyptic number.

It is an amenable number.

55229980 is an abundant number, since it is smaller than the sum of its proper divisors (69675332).

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

55229980 is a wasteful number, since it uses less digits than its factorization.

55229980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 212445 (or 212443 counting only the distinct ones).

The product of its (nonzero) digits is 64800, while the sum is 40.

The square root of 55229980 is about 7431.6875607092. The cubic root of 55229980 is about 380.8245714054.

The spelling of 55229980 in words is "fifty-five million, two hundred twenty-nine thousand, nine hundred eighty".