40453221 has 4 divisors (see below), whose sum is σ = 53937632. Its totient is φ = 26968812.

The previous prime is 40453219. The next prime is 40453241. The reversal of 40453221 is 12235404.

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 not a de Polignac number, because 40453221 - 2¹ = 40453219 is a prime.

It is a super-3 number, since 3×40453221³ (a number of 24 digits) contains 333 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40453201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6742201 + ... + 6742206.

It is an arithmetic number, because the mean of its divisors is an integer number (13484408).

Almost surely, 2^40453221 is an apocalyptic number.

It is an amenable number.

40453221 is a deficient number, since it is larger than the sum of its proper divisors (13484411).

40453221 is a wasteful number, since it uses less digits than its factorization.

40453221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13484410.

The product of its (nonzero) digits is 960, while the sum is 21.

The square root of 40453221 is about 6360.2846634408. The cubic root of 40453221 is about 343.2820030928.

Adding to 40453221 its reverse (12235404), we get a palindrome (52688625).

The spelling of 40453221 in words is "forty million, four hundred fifty-three thousand, two hundred twenty-one".