40221361 has 2 divisors, whose sum is σ = 40221362. Its totient is φ = 40221360.

The previous prime is 40221343. The next prime is 40221367. The reversal of 40221361 is 16312204.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 39929761 + 291600 = 6319^2 + 540^2 .

It is a cyclic number.

It is not a de Polignac number, because 40221361 - 2¹⁵ = 40188593 is a prime.

It is not a weakly prime, because it can be changed into another prime (40221367) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20110680 + 20110681.

It is an arithmetic number, because the mean of its divisors is an integer number (20110681).

Almost surely, 2^40221361 is an apocalyptic number.

It is an amenable number.

40221361 is a deficient number, since it is larger than the sum of its proper divisors (1).

40221361 is an equidigital number, since it uses as much as digits as its factorization.

40221361 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 288, while the sum is 19.

The square root of 40221361 is about 6342.0312991974. The cubic root of 40221361 is about 342.6248991259.

Adding to 40221361 its reverse (16312204), we get a palindrome (56533565).

The spelling of 40221361 in words is "forty million, two hundred twenty-one thousand, three hundred sixty-one".