55221060 has 48 divisors (see below), whose sum is σ = 155332800. Its totient is φ = 14657664.

The previous prime is 55221059. The next prime is 55221077. The reversal of 55221060 is 6012255.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11731 + ... + 15749.

It is an arithmetic number, because the mean of its divisors is an integer number (3236100).

Almost surely, 2^55221060 is an apocalyptic number.

It is an amenable number.

55221060 is an abundant number, since it is smaller than the sum of its proper divisors (100111740).

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

55221060 is a wasteful number, since it uses less digits than its factorization.

55221060 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4260 (or 4258 counting only the distinct ones).

The product of its (nonzero) digits is 600, while the sum is 21.

The square root of 55221060 is about 7431.0874036039. The cubic root of 55221060 is about 380.8040684222.

It can be divided in two parts, 552 and 21060, that added together give a palindrome (21612).

The spelling of 55221060 in words is "fifty-five million, two hundred twenty-one thousand, sixty".