221413344402 has 16 divisors (see below), whose sum is σ = 442907606592. Its totient is φ = 73790961840.

The previous prime is 221413344401. The next prime is 221413344407. The reversal of 221413344402 is 204443314122.

It is a self number, because there is not a number n which added to its sum of digits gives 221413344402.

It is not an unprimeable number, because it can be changed into a prime (221413344401) 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, 3335974 + ... + 3401697.

It is an arithmetic number, because the mean of its divisors is an integer number (27681725412).

Almost surely, 2^221413344402 is an apocalyptic number.

221413344402 is an abundant number, since it is smaller than the sum of its proper divisors (221494262190).

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

221413344402 is a wasteful number, since it uses less digits than its factorization.

221413344402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6743153.

The product of its (nonzero) digits is 18432, while the sum is 30.

Adding to 221413344402 its reverse (204443314122), we get a palindrome (425856658524).

The spelling of 221413344402 in words is "two hundred twenty-one billion, four hundred thirteen million, three hundred forty-four thousand, four hundred two".