221002150056 has 64 divisors (see below), whose sum is σ = 556101866880. Its totient is φ = 73188311040.

The previous prime is 221002150037. The next prime is 221002150073. The reversal of 221002150056 is 650051200122.

It is a happy number.

It is a super-4 number, since 4×221002150056⁴ (a number of 46 digits) contains 4444 as substring.

It is a Harshad number since it is a multiple of its sum of digits (24).

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, 8327400 + ... + 8353896.

It is an arithmetic number, because the mean of its divisors is an integer number (8689091670).

Almost surely, 2^221002150056 is an apocalyptic number.

It is an amenable number.

221002150056 is an abundant number, since it is smaller than the sum of its proper divisors (335099716824).

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

221002150056 is a wasteful number, since it uses less digits than its factorization.

221002150056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28754 (or 28750 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 24.

Adding to 221002150056 its reverse (650051200122), we get a palindrome (871053350178).

The spelling of 221002150056 in words is "two hundred twenty-one billion, two million, one hundred fifty thousand, fifty-six".