40302221 has 4 divisors (see below), whose sum is σ = 41285244. Its totient is φ = 39319200.

The previous prime is 40302217. The next prime is 40302247. The reversal of 40302221 is 12220304.

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 23377225 + 16924996 = 4835^2 + 4114^2 .

It is a cyclic number.

It is not a de Polignac number, because 40302221 - 2² = 40302217 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 40302196 and 40302205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40302271) 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, 491450 + ... + 491531.

It is an arithmetic number, because the mean of its divisors is an integer number (10321311).

Almost surely, 2^40302221 is an apocalyptic number.

40302221 is a gapful number since it is divisible by the number (41) formed by its first and last digit.

It is an amenable number.

40302221 is a deficient number, since it is larger than the sum of its proper divisors (983023).

40302221 is an equidigital number, since it uses as much as digits as its factorization.

40302221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 983022.

The product of its (nonzero) digits is 96, while the sum is 14.

The square root of 40302221 is about 6348.4030275338. The cubic root of 40302221 is about 342.8543468935.

Adding to 40302221 its reverse (12220304), we get a palindrome (52522525).

The spelling of 40302221 in words is "forty million, three hundred two thousand, two hundred twenty-one".