40223213 has 4 divisors (see below), whose sum is σ = 41520768. Its totient is φ = 38925660.

The previous prime is 40223153. The next prime is 40223233. The reversal of 40223213 is 31232204.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 40223213 - 2¹⁸ = 39961069 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 40223191 and 40223200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40223233) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 648731 + ... + 648792.

It is an arithmetic number, because the mean of its divisors is an integer number (10380192).

Almost surely, 2^40223213 is an apocalyptic number.

It is an amenable number.

40223213 is a deficient number, since it is larger than the sum of its proper divisors (1297555).

40223213 is a wasteful number, since it uses less digits than its factorization.

40223213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1297554.

The product of its (nonzero) digits is 288, while the sum is 17.

The square root of 40223213 is about 6342.1773075183. The cubic root of 40223213 is about 342.6301577875.

Adding to 40223213 its reverse (31232204), we get a palindrome (71455417).

The spelling of 40223213 in words is "forty million, two hundred twenty-three thousand, two hundred thirteen".