227436561 has 27 divisors (see below), whose sum is σ = 361891803. Its totient is φ = 137538720.

The previous prime is 227436551. The next prime is 227436607. The reversal of 227436561 is 165634722.

The square root of 227436561 is 15081.

It is a perfect power (a square), and thus also a powerful number.

227436561 is a `hidden beast` number, since 22 + 74 + 3 + 6 + 561 = 666.

It can be written as a sum of positive squares in only one way, i.e., 196700625 + 30735936 = 14025^2 + 5544^2 .

It is a de Polignac number, because none of the positive numbers 2^k-227436561 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (227436551) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 497445 + ... + 497901.

Almost surely, 2^227436561 is an apocalyptic number.

227436561 is the 15081-st square number.

227436561 is the 7541-st centered octagonal number.

It is an amenable number.

227436561 is a deficient number, since it is larger than the sum of its proper divisors (134455242).

227436561 is an equidigital number, since it uses as much as digits as its factorization.

227436561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 942 (or 471 counting only the distinct ones).

The product of its digits is 60480, while the sum is 36.

The cubic root of 227436561 is about 610.4078263570.

Multiplying 227436561 by its sum of digits (36), we get a square (8187716196 = 90486²).

The spelling of 227436561 in words is "two hundred twenty-seven million, four hundred thirty-six thousand, five hundred sixty-one".