228527561 has 2 divisors, whose sum is σ = 228527562. Its totient is φ = 228527560.

The previous prime is 228527543. The next prime is 228527581. The reversal of 228527561 is 165725822.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 124099600 + 104427961 = 11140^2 + 10219^2 .

It is a cyclic number.

It is not a de Polignac number, because 228527561 - 2¹⁰ = 228526537 is a prime.

It is a super-2 number, since 2×228527561² = 104449692273217442, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (228527581) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 114263780 + 114263781.

It is an arithmetic number, because the mean of its divisors is an integer number (114263781).

Almost surely, 2^228527561 is an apocalyptic number.

It is an amenable number.

228527561 is a deficient number, since it is larger than the sum of its proper divisors (1).

228527561 is an equidigital number, since it uses as much as digits as its factorization.

228527561 is an evil number, because the sum of its binary digits is even.

The product of its digits is 67200, while the sum is 38.

The square root of 228527561 is about 15117.1280671958. The cubic root of 228527561 is about 611.3823001697.

The spelling of 228527561 in words is "two hundred twenty-eight million, five hundred twenty-seven thousand, five hundred sixty-one".