647227212 has 24 divisors (see below), whose sum is σ = 1510715136. Its totient is φ = 215668368.

The previous prime is 647227211. The next prime is 647227219. The reversal of 647227212 is 212722746.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (647227211) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 36033 + ... + 50919.

It is an arithmetic number, because the mean of its divisors is an integer number (62946464).

Almost surely, 2^647227212 is an apocalyptic number.

It is an amenable number.

647227212 is an abundant number, since it is smaller than the sum of its proper divisors (863487924).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

647227212 is a wasteful number, since it uses less digits than its factorization.

647227212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18517 (or 18515 counting only the distinct ones).

The product of its digits is 18816, while the sum is 33.

The square root of 647227212 is about 25440.6606046305. The cubic root of 647227212 is about 865.0056074569.

Adding to 647227212 its reverse (212722746), we get a palindrome (859949958).

The spelling of 647227212 in words is "six hundred forty-seven million, two hundred twenty-seven thousand, two hundred twelve".