72015212 has 6 divisors (see below), whose sum is σ = 126026628. Its totient is φ = 36007604.

The previous prime is 72015211. The next prime is 72015221. The reversal of 72015212 is 21251027.

It is not an unprimeable number, because it can be changed into a prime (72015211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9001898 + ... + 9001905.

It is an arithmetic number, because the mean of its divisors is an integer number (21004438).

Almost surely, 2^72015212 is an apocalyptic number.

It is an amenable number.

72015212 is a deficient number, since it is larger than the sum of its proper divisors (54011416).

72015212 is a wasteful number, since it uses less digits than its factorization.

72015212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18003807 (or 18003805 counting only the distinct ones).

The product of its (nonzero) digits is 280, while the sum is 20.

The square root of 72015212 is about 8486.1777025938. The cubic root of 72015212 is about 416.0460609131.

Adding to 72015212 its reverse (21251027), we get a palindrome (93266239).

It can be divided in two parts, 72015 and 212, that added together give a palindrome (72227).

The spelling of 72015212 in words is "seventy-two million, fifteen thousand, two hundred twelve".