63551361 has 4 divisors (see below), whose sum is σ = 84735152. Its totient is φ = 42367572.

The previous prime is 63551359. The next prime is 63551401. The reversal of 63551361 is 16315536.

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 not a de Polignac number, because 63551361 - 2¹ = 63551359 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (63551351) 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, 10591891 + ... + 10591896.

It is an arithmetic number, because the mean of its divisors is an integer number (21183788).

Almost surely, 2^63551361 is an apocalyptic number.

It is an amenable number.

63551361 is a deficient number, since it is larger than the sum of its proper divisors (21183791).

63551361 is a wasteful number, since it uses less digits than its factorization.

63551361 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21183790.

The product of its digits is 8100, while the sum is 30.

The square root of 63551361 is about 7971.9107496258. The cubic root of 63551361 is about 399.0631428766.

Adding to 63551361 its reverse (16315536), we get a palindrome (79866897).

The spelling of 63551361 in words is "sixty-three million, five hundred fifty-one thousand, three hundred sixty-one".