40512322421 has 4 divisors (see below), whose sum is σ = 41607250092. Its totient is φ = 39417394752.

The previous prime is 40512322393. The next prime is 40512322427. The reversal of 40512322421 is 12422321504.

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 21915545521 + 18596776900 = 148039^2 + 136370^2 .

It is a cyclic number.

It is not a de Polignac number, because 40512322421 - 2¹⁰ = 40512321397 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 (40512322427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 547463780 + ... + 547463853.

It is an arithmetic number, because the mean of its divisors is an integer number (10401812523).

Almost surely, 2^40512322421 is an apocalyptic number.

It is an amenable number.

40512322421 is a deficient number, since it is larger than the sum of its proper divisors (1094927671).

40512322421 is a wasteful number, since it uses less digits than its factorization.

40512322421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1094927670.

The product of its (nonzero) digits is 3840, while the sum is 26.

Adding to 40512322421 its reverse (12422321504), we get a palindrome (52934643925).

The spelling of 40512322421 in words is "forty billion, five hundred twelve million, three hundred twenty-two thousand, four hundred twenty-one".