221949001 has 16 divisors (see below), whose sum is σ = 230791680. Its totient is φ = 213333120.

The previous prime is 221948989. The next prime is 221949019. The reversal of 221949001 is 100949122.

It is a happy number.

221949001 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 221949001 - 2¹¹ = 221946953 is a prime.

It is a super-2 number, since 2×221949001² = 98522718089796002, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (221949401) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 995176 + ... + 995398.

It is an arithmetic number, because the mean of its divisors is an integer number (14424480).

Almost surely, 2^221949001 is an apocalyptic number.

It is an amenable number.

221949001 is a deficient number, since it is larger than the sum of its proper divisors (8842679).

221949001 is a wasteful number, since it uses less digits than its factorization.

221949001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 576.

The product of its (nonzero) digits is 1296, while the sum is 28.

The square root of 221949001 is about 14897.9529130683. The cubic root of 221949001 is about 605.4585245174.

The spelling of 221949001 in words is "two hundred twenty-one million, nine hundred forty-nine thousand, one".