221287002 has 16 divisors (see below), whose sum is σ = 461816640. Its totient is φ = 70555232.

The previous prime is 221286991. The next prime is 221287009. The reversal of 221287002 is 200782122.

It is a happy number.

221287002 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (221287009) 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, 801627 + ... + 801902.

It is an arithmetic number, because the mean of its divisors is an integer number (28863540).

Almost surely, 2^221287002 is an apocalyptic number.

221287002 is an abundant number, since it is smaller than the sum of its proper divisors (240529638).

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

221287002 is a wasteful number, since it uses less digits than its factorization.

221287002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1603557.

The product of its (nonzero) digits is 896, while the sum is 24.

The square root of 221287002 is about 14875.7185372674. The cubic root of 221287002 is about 604.8559655298.

The spelling of 221287002 in words is "two hundred twenty-one million, two hundred eighty-seven thousand, two".