40322621 has 4 divisors (see below), whose sum is σ = 40374012. Its totient is φ = 40271232.

The previous prime is 40322603. The next prime is 40322641. The reversal of 40322621 is 12622304.

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 19483396 + 20839225 = 4414^2 + 4565^2 .

It is a cyclic number.

It is not a de Polignac number, because 40322621 - 2¹⁴ = 40306237 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 40322593 and 40322602.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40322641) 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, 24500 + ... + 26093.

It is an arithmetic number, because the mean of its divisors is an integer number (10093503).

Almost surely, 2^40322621 is an apocalyptic number.

It is an amenable number.

40322621 is a deficient number, since it is larger than the sum of its proper divisors (51391).

40322621 is an equidigital number, since it uses as much as digits as its factorization.

40322621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51390.

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 40322621 is about 6350.0095275519. The cubic root of 40322621 is about 342.9121853015.

Adding to 40322621 its reverse (12622304), we get a palindrome (52944925).

The spelling of 40322621 in words is "forty million, three hundred twenty-two thousand, six hundred twenty-one".