40821223 has 2 divisors, whose sum is σ = 40821224. Its totient is φ = 40821222.

The previous prime is 40821217. The next prime is 40821247. The reversal of 40821223 is 32212804.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40821223 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 40821194 and 40821203.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40821523) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20410611 + 20410612.

It is an arithmetic number, because the mean of its divisors is an integer number (20410612).

Almost surely, 2^40821223 is an apocalyptic number.

40821223 is a deficient number, since it is larger than the sum of its proper divisors (1).

40821223 is an equidigital number, since it uses as much as digits as its factorization.

40821223 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 768, while the sum is 22.

The square root of 40821223 is about 6389.1488478513. The cubic root of 40821223 is about 344.3198052413.

The spelling of 40821223 in words is "forty million, eight hundred twenty-one thousand, two hundred twenty-three".