221463057 has 4 divisors (see below), whose sum is σ = 295284080. Its totient is φ = 147642036.

The previous prime is 221463041. The next prime is 221463079. The reversal of 221463057 is 750364122.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 221463057 - 2⁴ = 221463041 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221463037) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 36910507 + ... + 36910512.

It is an arithmetic number, because the mean of its divisors is an integer number (73821020).

Almost surely, 2^221463057 is an apocalyptic number.

It is an amenable number.

221463057 is a deficient number, since it is larger than the sum of its proper divisors (73821023).

221463057 is an equidigital number, since it uses as much as digits as its factorization.

221463057 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73821022.

The product of its (nonzero) digits is 10080, while the sum is 30.

The square root of 221463057 is about 14881.6348900247. The cubic root of 221463057 is about 605.0163299556.

The spelling of 221463057 in words is "two hundred twenty-one million, four hundred sixty-three thousand, fifty-seven".