63572257 has 6 divisors (see below), whose sum is σ = 73951458. Its totient is φ = 54490464.

The previous prime is 63572237. The next prime is 63572261. The reversal of 63572257 is 75227536.

It can be written as a sum of positive squares in only one way, i.e., 63345681 + 226576 = 7959^2 + 476^2 .

It is not a de Polignac number, because 63572257 - 2¹¹ = 63570209 is a prime.

It is not an unprimeable number, because it can be changed into a prime (63572237) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 648648 + ... + 648745.

It is an arithmetic number, because the mean of its divisors is an integer number (12325243).

Almost surely, 2^63572257 is an apocalyptic number.

It is an amenable number.

63572257 is a deficient number, since it is larger than the sum of its proper divisors (10379201).

63572257 is a wasteful number, since it uses less digits than its factorization.

63572257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1297407 (or 1297400 counting only the distinct ones).

The product of its digits is 88200, while the sum is 37.

The square root of 63572257 is about 7973.2212436380. The cubic root of 63572257 is about 399.1068760583.

The spelling of 63572257 in words is "sixty-three million, five hundred seventy-two thousand, two hundred fifty-seven".