40223421 has 12 divisors (see below), whose sum is σ = 66400672. Its totient is φ = 22984776.

The previous prime is 40223413. The next prime is 40223423. The reversal of 40223421 is 12432204.

It is not a de Polignac number, because 40223421 - 2³ = 40223413 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 40223394 and 40223403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40223423) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 319171 + ... + 319296.

Almost surely, 2^40223421 is an apocalyptic number.

It is an amenable number.

40223421 is a deficient number, since it is larger than the sum of its proper divisors (26177251).

40223421 is a wasteful number, since it uses less digits than its factorization.

40223421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 638480 (or 638477 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

The square root of 40223421 is about 6342.1937056511. The cubic root of 40223421 is about 342.6307483830.

Adding to 40223421 its reverse (12432204), we get a palindrome (52655625).

The spelling of 40223421 in words is "forty million, two hundred twenty-three thousand, four hundred twenty-one".