40315261 has 16 divisors (see below), whose sum is σ = 47001600. Its totient is φ = 33868800.

The previous prime is 40315229. The next prime is 40315267. The reversal of 40315261 is 16251304.

It is not a de Polignac number, because 40315261 - 2⁵ = 40315229 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 (40315267) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 89565 + ... + 90013.

It is an arithmetic number, because the mean of its divisors is an integer number (2937600).

Almost surely, 2^40315261 is an apocalyptic number.

It is an amenable number.

40315261 is a deficient number, since it is larger than the sum of its proper divisors (6686339).

40315261 is a wasteful number, since it uses less digits than its factorization.

40315261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 684.

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 40315261 is about 6349.4299744150. The cubic root of 40315261 is about 342.8913203611.

Adding to 40315261 its reverse (16251304), we get a palindrome (56566565).

The spelling of 40315261 in words is "forty million, three hundred fifteen thousand, two hundred sixty-one".