221054377 has 4 divisors (see below), whose sum is σ = 223200640. Its totient is φ = 218908116.

The previous prime is 221054371. The next prime is 221054401. The reversal of 221054377 is 773450122.

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 a cyclic number.

It is not a de Polignac number, because 221054377 - 2³ = 221054369 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221054371) 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 3 ways as a sum of consecutive naturals, for example, 1072977 + ... + 1073182.

It is an arithmetic number, because the mean of its divisors is an integer number (55800160).

Almost surely, 2^221054377 is an apocalyptic number.

It is an amenable number.

221054377 is a deficient number, since it is larger than the sum of its proper divisors (2146263).

221054377 is a wasteful number, since it uses less digits than its factorization.

221054377 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2146262.

The product of its (nonzero) digits is 11760, while the sum is 31.

The square root of 221054377 is about 14867.8975312584. The cubic root of 221054377 is about 604.6439423033.

The spelling of 221054377 in words is "two hundred twenty-one million, fifty-four thousand, three hundred seventy-seven".