47018561 has 2 divisors, whose sum is σ = 47018562. Its totient is φ = 47018560.

The previous prime is 47018533. The next prime is 47018591. The reversal of 47018561 is 16581074.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 32993536 + 14025025 = 5744^2 + 3745^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-47018561 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is an alternating number because its digits alternate between even and odd.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (47018591) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 23509280 + 23509281.

It is an arithmetic number, because the mean of its divisors is an integer number (23509281).

Almost surely, 2^47018561 is an apocalyptic number.

It is an amenable number.

47018561 is a deficient number, since it is larger than the sum of its proper divisors (1).

47018561 is an equidigital number, since it uses as much as digits as its factorization.

47018561 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6720, while the sum is 32.

The square root of 47018561 is about 6857.0081668319. The cubic root of 47018561 is about 360.9301077339.

The spelling of 47018561 in words is "forty-seven million, eighteen thousand, five hundred sixty-one".