647222601 has 4 divisors (see below), whose sum is σ = 862963472. Its totient is φ = 431481732.

The previous prime is 647222579. The next prime is 647222617. The reversal of 647222601 is 106222746.

647222601 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a de Polignac number, because none of the positive numbers 2^k-647222601 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (647222671) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 107870431 + ... + 107870436.

It is an arithmetic number, because the mean of its divisors is an integer number (215740868).

Almost surely, 2^647222601 is an apocalyptic number.

It is an amenable number.

647222601 is a deficient number, since it is larger than the sum of its proper divisors (215740871).

647222601 is a wasteful number, since it uses less digits than its factorization.

647222601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 215740870.

The product of its (nonzero) digits is 8064, while the sum is 30.

The square root of 647222601 is about 25440.5699818223. The cubic root of 647222601 is about 865.0035532838.

The spelling of 647222601 in words is "six hundred forty-seven million, two hundred twenty-two thousand, six hundred one".