40220311 has 4 divisors (see below), whose sum is σ = 40252392. Its totient is φ = 40188232.

The previous prime is 40220309. The next prime is 40220329. The reversal of 40220311 is 11302204.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 40220311 - 2¹ = 40220309 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 40220291 and 40220300.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40220381) 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, 14080 + ... + 16693.

It is an arithmetic number, because the mean of its divisors is an integer number (10063098).

Almost surely, 2^40220311 is an apocalyptic number.

40220311 is a deficient number, since it is larger than the sum of its proper divisors (32081).

40220311 is a wasteful number, since it uses less digits than its factorization.

40220311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32080.

The product of its (nonzero) digits is 48, while the sum is 13.

The square root of 40220311 is about 6341.9485176088. The cubic root of 40220311 is about 342.6219176316.

Adding to 40220311 its reverse (11302204), we get a palindrome (51522515).

The spelling of 40220311 in words is "forty million, two hundred twenty thousand, three hundred eleven".