40215061 has 4 divisors (see below), whose sum is σ = 40447692. Its totient is φ = 39982432.

The previous prime is 40215037. The next prime is 40215073. The reversal of 40215061 is 16051204.

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 33292900 + 6922161 = 5770^2 + 2631^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40215061 is a prime.

It is a super-2 number, since 2×40215061² = 3234502262467442, which 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 (40215031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 116056 + ... + 116401.

It is an arithmetic number, because the mean of its divisors is an integer number (10111923).

Almost surely, 2^40215061 is an apocalyptic number.

It is an amenable number.

40215061 is a deficient number, since it is larger than the sum of its proper divisors (232631).

40215061 is a wasteful number, since it uses less digits than its factorization.

40215061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 232630.

The product of its (nonzero) digits is 240, while the sum is 19.

The square root of 40215061 is about 6341.5345934561. The cubic root of 40215061 is about 342.6070093818.

Adding to 40215061 its reverse (16051204), we get a palindrome (56266265).

The spelling of 40215061 in words is "forty million, two hundred fifteen thousand, sixty-one".