40520219 has 2 divisors, whose sum is σ = 40520220. Its totient is φ = 40520218.

The previous prime is 40520213. The next prime is 40520237. The reversal of 40520219 is 91202504.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 40520219 - 2¹² = 40516123 is a prime.

It is a super-2 number, since 2×40520219² = 3283776295615922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 40520194 and 40520203.

It is not a weakly prime, because it can be changed into another prime (40520213) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20260109 + 20260110.

It is an arithmetic number, because the mean of its divisors is an integer number (20260110).

Almost surely, 2^40520219 is an apocalyptic number.

40520219 is a deficient number, since it is larger than the sum of its proper divisors (1).

40520219 is an equidigital number, since it uses as much as digits as its factorization.

40520219 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 720, while the sum is 23.

The square root of 40520219 is about 6365.5493871307. The cubic root of 40520219 is about 343.4714113506.

The spelling of 40520219 in words is "forty million, five hundred twenty thousand, two hundred nineteen".