40001513 has 4 divisors (see below), whose sum is σ = 40014480. Its totient is φ = 39988548.

The previous prime is 40001509. The next prime is 40001519. The reversal of 40001513 is 31510004.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 40001513 - 2² = 40001509 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40001519) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1106 + ... + 9012.

It is an arithmetic number, because the mean of its divisors is an integer number (10003620).

Almost surely, 2^40001513 is an apocalyptic number.

It is an amenable number.

40001513 is a deficient number, since it is larger than the sum of its proper divisors (12967).

40001513 is an equidigital number, since it uses as much as digits as its factorization.

40001513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12966.

The product of its (nonzero) digits is 60, while the sum is 14.

The square root of 40001513 is about 6324.6749323582. The cubic root of 40001513 is about 341.9995012703. Note that the first 3 decimals are identical.

Adding to 40001513 its reverse (31510004), we get a palindrome (71511517).

The spelling of 40001513 in words is "forty million, one thousand, five hundred thirteen".