227640643 has 4 divisors (see below), whose sum is σ = 227738320. Its totient is φ = 227542968.

The previous prime is 227640641. The next prime is 227640661. The reversal of 227640643 is 346046722.

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

It is a cyclic number.

It is not a de Polignac number, because 227640643 - 2¹ = 227640641 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 227640599 and 227640608.

It is not an unprimeable number, because it can be changed into a prime (227640641) 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, 45255 + ... + 50032.

It is an arithmetic number, because the mean of its divisors is an integer number (56934580).

Almost surely, 2^227640643 is an apocalyptic number.

227640643 is a deficient number, since it is larger than the sum of its proper divisors (97677).

227640643 is an equidigital number, since it uses as much as digits as its factorization.

227640643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 97676.

The product of its (nonzero) digits is 48384, while the sum is 34.

The square root of 227640643 is about 15087.7646787057. The cubic root of 227640643 is about 610.5903475951.

The spelling of 227640643 in words is "two hundred twenty-seven million, six hundred forty thousand, six hundred forty-three".