40404312321 has 16 divisors (see below), whose sum is σ = 55747732800. Its totient is φ = 25999138368.

The previous prime is 40404312287. The next prime is 40404312337. The reversal of 40404312321 is 12321340404.

It is not a de Polignac number, because 40404312321 - 2¹⁷ = 40404181249 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 40404312291 and 40404312300.

It is not an unprimeable number, because it can be changed into a prime (40404312121) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 209010 + ... + 352836.

It is an arithmetic number, because the mean of its divisors is an integer number (3484233300).

Almost surely, 2^40404312321 is an apocalyptic number.

It is an amenable number.

40404312321 is a deficient number, since it is larger than the sum of its proper divisors (15343420479).

40404312321 is a wasteful number, since it uses less digits than its factorization.

40404312321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 147088.

The product of its (nonzero) digits is 2304, while the sum is 24.

Adding to 40404312321 its reverse (12321340404), we get a palindrome (52725652725).

The spelling of 40404312321 in words is "forty billion, four hundred four million, three hundred twelve thousand, three hundred twenty-one".