40232142221 has 4 divisors (see below), whose sum is σ = 41619457500. Its totient is φ = 38844826944.

The previous prime is 40232142193. The next prime is 40232142229. The reversal of 40232142221 is 12224123204.

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 26442337321 + 13789804900 = 162611^2 + 117430^2 .

It is a cyclic number.

It is not a de Polignac number, because 40232142221 - 2⁶ = 40232142157 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 (40232142229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 693657596 + ... + 693657653.

It is an arithmetic number, because the mean of its divisors is an integer number (10404864375).

Almost surely, 2^40232142221 is an apocalyptic number.

It is an amenable number.

40232142221 is a deficient number, since it is larger than the sum of its proper divisors (1387315279).

40232142221 is a wasteful number, since it uses less digits than its factorization.

40232142221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1387315278.

The product of its (nonzero) digits is 1536, while the sum is 23.

Adding to 40232142221 its reverse (12224123204), we get a palindrome (52456265425).

The spelling of 40232142221 in words is "forty billion, two hundred thirty-two million, one hundred forty-two thousand, two hundred twenty-one".