40513311 has 32 divisors (see below), whose sum is σ = 62720000. Its totient is φ = 25816320.

The previous prime is 40513279. The next prime is 40513331. The reversal of 40513311 is 11331504.

It is not a de Polignac number, because 40513311 - 2⁵ = 40513279 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 (40513331) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 80940 + ... + 81438.

It is an arithmetic number, because the mean of its divisors is an integer number (1960000).

Almost surely, 2^40513311 is an apocalyptic number.

40513311 is a deficient number, since it is larger than the sum of its proper divisors (22206689).

40513311 is a wasteful number, since it uses less digits than its factorization.

40513311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 636 (or 630 counting only the distinct ones).

The product of its (nonzero) digits is 180, while the sum is 18.

The square root of 40513311 is about 6365.0067556916. The cubic root of 40513311 is about 343.4518915864.

Adding to 40513311 its reverse (11331504), we get a palindrome (51844815).

The spelling of 40513311 in words is "forty million, five hundred thirteen thousand, three hundred eleven".