40216261 has 4 divisors (see below), whose sum is σ = 40284000. Its totient is φ = 40148524.

The previous prime is 40216219. The next prime is 40216273. The reversal of 40216261 is 16261204.

40216261 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 40216261 - 2⁷ = 40216133 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40216861) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32971 + ... + 34168.

It is an arithmetic number, because the mean of its divisors is an integer number (10071000).

Almost surely, 2^40216261 is an apocalyptic number.

It is an amenable number.

40216261 is a deficient number, since it is larger than the sum of its proper divisors (67739).

40216261 is an equidigital number, since it uses as much as digits as its factorization.

40216261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67738.

The product of its (nonzero) digits is 576, while the sum is 22.

The square root of 40216261 is about 6341.6292070729. The cubic root of 40216261 is about 342.6104170961.

Adding to 40216261 its reverse (16261204), we get a palindrome (56477465).

The spelling of 40216261 in words is "forty million, two hundred sixteen thousand, two hundred sixty-one".