40304100421 has 4 divisors (see below), whose sum is σ = 43404415852. Its totient is φ = 37203784992.

The previous prime is 40304100383. The next prime is 40304100427. The reversal of 40304100421 is 12400140304.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 22714709796 + 17589390625 = 150714^2 + 132625^2 .

It is a cyclic number.

It is not a de Polignac number, because 40304100421 - 2¹³ = 40304092229 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40304100427) 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, 1550157696 + ... + 1550157721.

It is an arithmetic number, because the mean of its divisors is an integer number (10851103963).

Almost surely, 2^40304100421 is an apocalyptic number.

It is an amenable number.

40304100421 is a deficient number, since it is larger than the sum of its proper divisors (3100315431).

40304100421 is a wasteful number, since it uses less digits than its factorization.

40304100421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3100315430.

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

Adding to 40304100421 its reverse (12400140304), we get a palindrome (52704240725).

The spelling of 40304100421 in words is "forty billion, three hundred four million, one hundred thousand, four hundred twenty-one".