40015513 has 4 divisors (see below), whose sum is σ = 41306368. Its totient is φ = 38724660.

The previous prime is 40015489. The next prime is 40015519. The reversal of 40015513 is 31551004.

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.

It is a cyclic number.

It is not a de Polignac number, because 40015513 - 2¹³ = 40007321 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40015519) 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, 645381 + ... + 645442.

It is an arithmetic number, because the mean of its divisors is an integer number (10326592).

Almost surely, 2^40015513 is an apocalyptic number.

It is an amenable number.

40015513 is a deficient number, since it is larger than the sum of its proper divisors (1290855).

40015513 is a wasteful number, since it uses less digits than its factorization.

40015513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1290854.

The product of its (nonzero) digits is 300, while the sum is 19.

The square root of 40015513 is about 6325.7816117852. The cubic root of 40015513 is about 342.0393950492.

Adding to 40015513 its reverse (31551004), we get a palindrome (71566517).

The spelling of 40015513 in words is "forty million, fifteen thousand, five hundred thirteen".