72771212 has 6 divisors (see below), whose sum is σ = 127349628. Its totient is φ = 36385604.

The previous prime is 72771211. The next prime is 72771233. The reversal of 72771212 is 21217727.

It is a plaindrome in base 16.

It is not an unprimeable number, because it can be changed into a prime (72771211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9096398 + ... + 9096405.

It is an arithmetic number, because the mean of its divisors is an integer number (21224938).

Almost surely, 2^72771212 is an apocalyptic number.

It is an amenable number.

72771212 is a deficient number, since it is larger than the sum of its proper divisors (54578416).

72771212 is a wasteful number, since it uses less digits than its factorization.

72771212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18192807 (or 18192805 counting only the distinct ones).

The product of its digits is 2744, while the sum is 29.

The square root of 72771212 is about 8530.6044334502. The cubic root of 72771212 is about 417.4968496302.

Adding to 72771212 its reverse (21217727), we get a palindrome (93988939).

The spelling of 72771212 in words is "seventy-two million, seven hundred seventy-one thousand, two hundred twelve".