40290223 has 2 divisors, whose sum is σ = 40290224. Its totient is φ = 40290222.

The previous prime is 40290197. The next prime is 40290247. The reversal of 40290223 is 32209204.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 40290223 - 2¹³ = 40282031 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 40290194 and 40290203.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40290293) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20145111 + 20145112.

It is an arithmetic number, because the mean of its divisors is an integer number (20145112).

Almost surely, 2^40290223 is an apocalyptic number.

40290223 is a deficient number, since it is larger than the sum of its proper divisors (1).

40290223 is an equidigital number, since it uses as much as digits as its factorization.

40290223 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 864, while the sum is 22.

The square root of 40290223 is about 6347.4579951347. The cubic root of 40290223 is about 342.8203208554.

Adding to 40290223 its reverse (32209204), we get a palindrome (72499427).

The spelling of 40290223 in words is "forty million, two hundred ninety thousand, two hundred twenty-three".