40513220 has 36 divisors (see below), whose sum is σ = 93520812. Its totient is φ = 14731200.

The previous prime is 40513219. The next prime is 40513237. The reversal of 40513220 is 2231504.

It can be written as a sum of positive squares in 2 ways, for example, as 29767936 + 10745284 = 5456^2 + 3278^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5951 + ... + 10790.

Almost surely, 2^40513220 is an apocalyptic number.

It is an amenable number.

40513220 is an abundant number, since it is smaller than the sum of its proper divisors (53007592).

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

40513220 is a wasteful number, since it uses less digits than its factorization.

40513220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16772 (or 16759 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 17.

The square root of 40513220 is about 6364.9996072270. Note that the first 3 decimals coincide. The cubic root of 40513220 is about 343.4516344351.

Adding to 40513220 its reverse (2231504), we get a palindrome (42744724).

The spelling of 40513220 in words is "forty million, five hundred thirteen thousand, two hundred twenty".