228054721 has 4 divisors (see below), whose sum is σ = 229719492. Its totient is φ = 226389952.

The previous prime is 228054691. The next prime is 228054727. The reversal of 228054721 is 127450822.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 52359696 + 175695025 = 7236^2 + 13255^2 .

It is a cyclic number.

It is not a de Polignac number, because 228054721 - 2⁵ = 228054689 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (228054727) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 832180 + ... + 832453.

It is an arithmetic number, because the mean of its divisors is an integer number (57429873).

Almost surely, 2^228054721 is an apocalyptic number.

It is an amenable number.

228054721 is a deficient number, since it is larger than the sum of its proper divisors (1664771).

228054721 is a wasteful number, since it uses less digits than its factorization.

228054721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1664770.

The product of its (nonzero) digits is 8960, while the sum is 31.

The square root of 228054721 is about 15101.4807552107. The cubic root of 228054721 is about 610.9603443306.

The spelling of 228054721 in words is "two hundred twenty-eight million, fifty-four thousand, seven hundred twenty-one".