40815513 has 12 divisors (see below), whose sum is σ = 59148180. Its totient is φ = 27121536.

The previous prime is 40815493. The next prime is 40815517. The reversal of 40815513 is 31551804.

It can be written as a sum of positive squares in 2 ways, for example, as 2214144 + 38601369 = 1488^2 + 6213^2 .

It is not a de Polignac number, because 40815513 - 2⁶ = 40815449 is a prime.

It is a super-2 number, since 2×40815513² = 3331812202906338, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (40815517) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4428 + ... + 10061.

It is an arithmetic number, because the mean of its divisors is an integer number (4929015).

Almost surely, 2^40815513 is an apocalyptic number.

It is an amenable number.

40815513 is a deficient number, since it is larger than the sum of its proper divisors (18332667).

40815513 is a wasteful number, since it uses less digits than its factorization.

40815513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14808 (or 14805 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 27.

The square root of 40815513 is about 6388.7019808409. The cubic root of 40815513 is about 344.3037502122.

It can be divided in two parts, 40815 and 513, that added together give a triangular number (41328 = T₂₈₇).

The spelling of 40815513 in words is "forty million, eight hundred fifteen thousand, five hundred thirteen".