40630321 has 4 divisors (see below), whose sum is σ = 40645872. Its totient is φ = 40614772.

The previous prime is 40630319. The next prime is 40630333. The reversal of 40630321 is 12303604.

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 40630321 - 2¹ = 40630319 is a prime.

It is a super-3 number, since 3×40630321³ (a number of 24 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40630621) 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, 2791 + ... + 9436.

It is an arithmetic number, because the mean of its divisors is an integer number (10161468).

Almost surely, 2^40630321 is an apocalyptic number.

It is an amenable number.

40630321 is a deficient number, since it is larger than the sum of its proper divisors (15551).

40630321 is a wasteful number, since it uses less digits than its factorization.

40630321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15550.

The product of its (nonzero) digits is 432, while the sum is 19.

The square root of 40630321 is about 6374.1917919059. The cubic root of 40630321 is about 343.7822248137.

Adding to 40630321 its reverse (12303604), we get a palindrome (52933925).

The spelling of 40630321 in words is "forty million, six hundred thirty thousand, three hundred twenty-one".