647233250 has 32 divisors (see below), whose sum is σ = 1223664624. Its totient is φ = 256320000.

The previous prime is 647233247. The next prime is 647233259. The reversal of 647233250 is 52332746.

It can be written as a sum of positive squares in 8 ways, for example, as 97752769 + 549480481 = 9887^2 + 23441^2 .

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (647233259) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12434 + ... + 38066.

Almost surely, 2^647233250 is an apocalyptic number.

647233250 is a deficient number, since it is larger than the sum of its proper divisors (576431374).

647233250 is a wasteful number, since it uses less digits than its factorization.

647233250 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25751 (or 25741 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 32.

The square root of 647233250 is about 25440.7792726559. The cubic root of 647233250 is about 865.0082973354.

Adding to 647233250 its reverse (52332746), we get a palindrome (699565996).

The spelling of 647233250 in words is "six hundred forty-seven million, two hundred thirty-three thousand, two hundred fifty".