40513224 has 64 divisors (see below), whose sum is σ = 106539840. Its totient is φ = 12821760.

The previous prime is 40513219. The next prime is 40513237. The reversal of 40513224 is 42231504.

It is a Cunningham number, because it is equal to 6365²-1.

It is a self number, because there is not a number n which added to its sum of digits gives 40513224.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 37654 + ... + 38714.

It is an arithmetic number, because the mean of its divisors is an integer number (1664685).

Almost surely, 2^40513224 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 40513224, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (53269920).

40513224 is an abundant number, since it is smaller than the sum of its proper divisors (66026616).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

40513224 is a wasteful number, since it uses less digits than its factorization.

40513224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1150 (or 1146 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 21.

The square root of 40513224 is about 6364.9999214454. Note that the first 4 decimals coincide. The cubic root of 40513224 is about 343.4516457385.

Adding to 40513224 its reverse (42231504), we get a palindrome (82744728).

The spelling of 40513224 in words is "forty million, five hundred thirteen thousand, two hundred twenty-four".