40220461 has 2 divisors, whose sum is σ = 40220462. Its totient is φ = 40220460.

The previous prime is 40220459. The next prime is 40220483. The reversal of 40220461 is 16402204.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 21996100 + 18224361 = 4690^2 + 4269^2 .

It is a cyclic number.

It is not a de Polignac number, because 40220461 - 2¹ = 40220459 is a prime.

Together with 40220459, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40220441) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20110230 + 20110231.

It is an arithmetic number, because the mean of its divisors is an integer number (20110231).

Almost surely, 2^40220461 is an apocalyptic number.

It is an amenable number.

40220461 is a deficient number, since it is larger than the sum of its proper divisors (1).

40220461 is an equidigital number, since it uses as much as digits as its factorization.

40220461 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 384, while the sum is 19.

The square root of 40220461 is about 6341.9603436162. The cubic root of 40220461 is about 342.6223435625.

Adding to 40220461 its reverse (16402204), we get a palindrome (56622665).

The spelling of 40220461 in words is "forty million, two hundred twenty thousand, four hundred sixty-one".