40512113 has 4 divisors (see below), whose sum is σ = 41176308. Its totient is φ = 39847920.

The previous prime is 40512091. The next prime is 40512119. The reversal of 40512113 is 31121504.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 7656289 + 32855824 = 2767^2 + 5732^2 .

It is a cyclic number.

It is not a de Polignac number, because 40512113 - 2⁶ = 40512049 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 40512091 and 40512100.

It is not an unprimeable number, because it can be changed into a prime (40512119) 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, 332006 + ... + 332127.

It is an arithmetic number, because the mean of its divisors is an integer number (10294077).

Almost surely, 2^40512113 is an apocalyptic number.

It is an amenable number.

40512113 is a deficient number, since it is larger than the sum of its proper divisors (664195).

40512113 is an equidigital number, since it uses as much as digits as its factorization.

40512113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 664194.

The product of its (nonzero) digits is 120, while the sum is 17.

The square root of 40512113 is about 6364.9126466904. The cubic root of 40512113 is about 343.4485062018.

Adding to 40512113 its reverse (31121504), we get a palindrome (71633617).

The spelling of 40512113 in words is "forty million, five hundred twelve thousand, one hundred thirteen".