40220323421 has 4 divisors (see below), whose sum is σ = 40221881244. Its totient is φ = 40218765600.

The previous prime is 40220323417. The next prime is 40220323427. The reversal of 40220323421 is 12432302204.

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 802588900 + 39417734521 = 28330^2 + 198539^2 .

It is a cyclic number.

It is not a de Polignac number, because 40220323421 - 2² = 40220323417 is a prime.

It is a super-2 number, since 2×40220323421² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40220323427) 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, 739520 + ... + 792041.

It is an arithmetic number, because the mean of its divisors is an integer number (10055470311).

Almost surely, 2^40220323421 is an apocalyptic number.

It is an amenable number.

40220323421 is a deficient number, since it is larger than the sum of its proper divisors (1557823).

40220323421 is a wasteful number, since it uses less digits than its factorization.

40220323421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1557822.

The product of its (nonzero) digits is 2304, while the sum is 23.

Adding to 40220323421 its reverse (12432302204), we get a palindrome (52652625625).

The spelling of 40220323421 in words is "forty billion, two hundred twenty million, three hundred twenty-three thousand, four hundred twenty-one".