40221019 has 2 divisors, whose sum is σ = 40221020. Its totient is φ = 40221018.

The previous prime is 40221017. The next prime is 40221023. The reversal of 40221019 is 91012204.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 40221019 - 2¹ = 40221017 is a prime.

It is a super-2 number, since 2×40221019² = 3235460738796722, which contains 22 as substring.

Together with 40221017, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 40220987 and 40221005.

It is not a weakly prime, because it can be changed into another prime (40221017) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20110509 + 20110510.

It is an arithmetic number, because the mean of its divisors is an integer number (20110510).

Almost surely, 2^40221019 is an apocalyptic number.

40221019 is a deficient number, since it is larger than the sum of its proper divisors (1).

40221019 is an equidigital number, since it uses as much as digits as its factorization.

40221019 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 144, while the sum is 19.

The square root of 40221019 is about 6342.0043361701. The cubic root of 40221019 is about 342.6239280163.

It can be divided in two parts, 4022 and 1019, that added together give a square (5041 = 71²).

The spelling of 40221019 in words is "forty million, two hundred twenty-one thousand, nineteen".