40144321 has 16 divisors (see below), whose sum is σ = 48470400. Its totient is φ = 32479488.

The previous prime is 40144309. The next prime is 40144331. The reversal of 40144321 is 12344104.

It is a cyclic number.

It is not a de Polignac number, because 40144321 - 2¹⁷ = 40013249 is a prime.

It is a super-2 number, since 2×40144321² = 3223133017102082, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40144301) 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 15 ways as a sum of consecutive naturals, for example, 67401 + ... + 67993.

It is an arithmetic number, because the mean of its divisors is an integer number (3029400).

Almost surely, 2^40144321 is an apocalyptic number.

It is an amenable number.

40144321 is a deficient number, since it is larger than the sum of its proper divisors (8326079).

40144321 is a wasteful number, since it uses less digits than its factorization.

40144321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1128.

The product of its (nonzero) digits is 384, while the sum is 19.

The square root of 40144321 is about 6335.9546242062. The cubic root of 40144321 is about 342.4060047177.

Adding to 40144321 its reverse (12344104), we get a palindrome (52488425).

The spelling of 40144321 in words is "forty million, one hundred forty-four thousand, three hundred twenty-one".