40220613 has 24 divisors (see below), whose sum is σ = 59319000. Its totient is φ = 26256384.

The previous prime is 40220599. The next prime is 40220639. The reversal of 40220613 is 31602204.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 492804 + 39727809 = 702^2 + 6303^2 .

It is not a de Polignac number, because 40220613 - 2⁵ = 40220581 is a prime.

It is a plaindrome in base 12.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40220683) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 119181 + ... + 119517.

It is an arithmetic number, because the mean of its divisors is an integer number (2471625).

Almost surely, 2^40220613 is an apocalyptic number.

It is an amenable number.

40220613 is a deficient number, since it is larger than the sum of its proper divisors (19098387).

40220613 is a wasteful number, since it uses less digits than its factorization.

40220613 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 581 (or 578 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 40220613 is about 6341.9723272812. The cubic root of 40220613 is about 342.6227751715.

Adding to 40220613 its reverse (31602204), we get a palindrome (71822817).

The spelling of 40220613 in words is "forty million, two hundred twenty thousand, six hundred thirteen".