63725231 has 4 divisors (see below), whose sum is σ = 67473792. Its totient is φ = 59976672.

The previous prime is 63725161. The next prime is 63725237. The reversal of 63725231 is 13252736.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 63725231 - 2¹⁰ = 63724207 is a prime.

It is a super-2 number, since 2×63725231² = 8121810132006722, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 63725194 and 63725203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63725237) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1874255 + ... + 1874288.

It is an arithmetic number, because the mean of its divisors is an integer number (16868448).

Almost surely, 2^63725231 is an apocalyptic number.

63725231 is a deficient number, since it is larger than the sum of its proper divisors (3748561).

63725231 is a wasteful number, since it uses less digits than its factorization.

63725231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3748560.

The product of its digits is 7560, while the sum is 29.

The square root of 63725231 is about 7982.8084656968. The cubic root of 63725231 is about 399.4267434180.

Adding to 63725231 its reverse (13252736), we get a palindrome (76977967).

The spelling of 63725231 in words is "sixty-three million, seven hundred twenty-five thousand, two hundred thirty-one".