221460001 has 16 divisors (see below), whose sum is σ = 261854208. Its totient is φ = 183283200.

The previous prime is 221459993. The next prime is 221460007. The reversal of 221460001 is 100064122.

It is a cyclic number.

It is not a de Polignac number, because 221460001 - 2³ = 221459993 is a prime.

It is not an unprimeable number, because it can be changed into a prime (221460007) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 127821 + ... + 129541.

It is an arithmetic number, because the mean of its divisors is an integer number (16365888).

Almost surely, 2^221460001 is an apocalyptic number.

It is an amenable number.

221460001 is a deficient number, since it is larger than the sum of its proper divisors (40394207).

221460001 is a wasteful number, since it uses less digits than its factorization.

221460001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2352.

The product of its (nonzero) digits is 96, while the sum is 16.

The square root of 221460001 is about 14881.5322127797. The cubic root of 221460001 is about 605.0135470409.

The spelling of 221460001 in words is "two hundred twenty-one million, four hundred sixty thousand, one".