63503161 has 4 divisors (see below), whose sum is σ = 66264192. Its totient is φ = 60742132.

The previous prime is 63503119. The next prime is 63503171. The reversal of 63503161 is 16130536.

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 cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-63503161 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (63503101) 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, 1380481 + ... + 1380526.

It is an arithmetic number, because the mean of its divisors is an integer number (16566048).

Almost surely, 2^63503161 is an apocalyptic number.

It is an amenable number.

63503161 is a deficient number, since it is larger than the sum of its proper divisors (2761031).

63503161 is a wasteful number, since it uses less digits than its factorization.

63503161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2761030.

The product of its (nonzero) digits is 1620, while the sum is 25.

The square root of 63503161 is about 7968.8870615664. The cubic root of 63503161 is about 398.9622286550.

Adding to 63503161 its reverse (16130536), we get a palindrome (79633697).

The spelling of 63503161 in words is "sixty-three million, five hundred three thousand, one hundred sixty-one".