40113433421 has 4 divisors (see below), whose sum is σ = 40114737852. Its totient is φ = 40112128992.

The previous prime is 40113433391. The next prime is 40113433433. The reversal of 40113433421 is 12433431104.

It is a happy number.

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 18331806025 + 21781627396 = 135395^2 + 147586^2 .

It is a cyclic number.

It is not a de Polignac number, because 40113433421 - 2¹⁴ = 40113417037 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 (40113436421) 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, 604946 + ... + 667971.

It is an arithmetic number, because the mean of its divisors is an integer number (10028684463).

Almost surely, 2^40113433421 is an apocalyptic number.

It is an amenable number.

40113433421 is a deficient number, since it is larger than the sum of its proper divisors (1304431).

40113433421 is a wasteful number, since it uses less digits than its factorization.

40113433421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1304430.

The product of its (nonzero) digits is 3456, while the sum is 26.

Adding to 40113433421 its reverse (12433431104), we get a palindrome (52546864525).

The spelling of 40113433421 in words is "forty billion, one hundred thirteen million, four hundred thirty-three thousand, four hundred twenty-one".