40515172 has 6 divisors (see below), whose sum is σ = 70901558. Its totient is φ = 20257584.

The previous prime is 40515157. The next prime is 40515173. The reversal of 40515172 is 27151504.

It can be written as a sum of positive squares in only one way, i.e., 33246756 + 7268416 = 5766^2 + 2696^2 .

It is not an unprimeable number, because it can be changed into a prime (40515173) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5064393 + ... + 5064400.

Almost surely, 2^40515172 is an apocalyptic number.

It is an amenable number.

40515172 is a deficient number, since it is larger than the sum of its proper divisors (30386386).

40515172 is a wasteful number, since it uses less digits than its factorization.

40515172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10128797 (or 10128795 counting only the distinct ones).

The product of its (nonzero) digits is 1400, while the sum is 25.

The square root of 40515172 is about 6365.1529439598. The cubic root of 40515172 is about 343.4571503863.

Adding to 40515172 its reverse (27151504), we get a palindrome (67666676).

The spelling of 40515172 in words is "forty million, five hundred fifteen thousand, one hundred seventy-two".