40464221 has 4 divisors (see below), whose sum is σ = 46244832. Its totient is φ = 34683612.

The previous prime is 40464217. The next prime is 40464223. The reversal of 40464221 is 12246404.

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 40464221 - 2² = 40464217 is a prime.

It is a super-2 number, since 2×40464221² = 3274706362273682, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40464223) 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, 2890295 + ... + 2890308.

It is an arithmetic number, because the mean of its divisors is an integer number (11561208).

Almost surely, 2^40464221 is an apocalyptic number.

It is an amenable number.

40464221 is a deficient number, since it is larger than the sum of its proper divisors (5780611).

40464221 is an equidigital number, since it uses as much as digits as its factorization.

40464221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5780610.

The product of its (nonzero) digits is 1536, while the sum is 23.

The square root of 40464221 is about 6361.1493458337. The cubic root of 40464221 is about 343.3131152410.

The spelling of 40464221 in words is "forty million, four hundred sixty-four thousand, two hundred twenty-one".