55221002 has 8 divisors (see below), whose sum is σ = 83380512. Its totient is φ = 27427500.

The previous prime is 55220993. The next prime is 55221007. The reversal of 55221002 is 20012255.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (55221007) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 91124 + ... + 91727.

It is an arithmetic number, because the mean of its divisors is an integer number (10422564).

Almost surely, 2^55221002 is an apocalyptic number.

55221002 is a deficient number, since it is larger than the sum of its proper divisors (28159510).

55221002 is a wasteful number, since it uses less digits than its factorization.

55221002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 183004.

The product of its (nonzero) digits is 200, while the sum is 17.

The square root of 55221002 is about 7431.0835010784. The cubic root of 55221002 is about 380.8039350996.

Adding to 55221002 its reverse (20012255), we get a palindrome (75233257).

The spelling of 55221002 in words is "fifty-five million, two hundred twenty-one thousand, two".