647425222 has 8 divisors (see below), whose sum is σ = 972005976. Its totient is φ = 323423232.

The previous prime is 647425211. The next prime is 647425253. The reversal of 647425222 is 222524746.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 141883 + ... + 146374.

It is an arithmetic number, because the mean of its divisors is an integer number (121500747).

Almost surely, 2^647425222 is an apocalyptic number.

647425222 is a deficient number, since it is larger than the sum of its proper divisors (324580754).

647425222 is a wasteful number, since it uses less digits than its factorization.

647425222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 289382.

The product of its digits is 53760, while the sum is 34.

The square root of 647425222 is about 25444.5519119516. The cubic root of 647425222 is about 865.0938105348.

Adding to 647425222 its reverse (222524746), we get a palindrome (869949968).

The spelling of 647425222 in words is "six hundred forty-seven million, four hundred twenty-five thousand, two hundred twenty-two".