40815212 has 6 divisors (see below), whose sum is σ = 71426628. Its totient is φ = 20407604.

The previous prime is 40815199. The next prime is 40815217. The reversal of 40815212 is 21251804.

It is not an unprimeable number, because it can be changed into a prime (40815217) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5101898 + ... + 5101905.

It is an arithmetic number, because the mean of its divisors is an integer number (11904438).

Almost surely, 2^40815212 is an apocalyptic number.

It is an amenable number.

40815212 is a deficient number, since it is larger than the sum of its proper divisors (30611416).

40815212 is a wasteful number, since it uses less digits than its factorization.

40815212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10203807 (or 10203805 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 23.

The square root of 40815212 is about 6388.6784235865. The cubic root of 40815212 is about 344.3029038372.

The spelling of 40815212 in words is "forty million, eight hundred fifteen thousand, two hundred twelve".