63161551 has 4 divisors (see below), whose sum is σ = 63349312. Its totient is φ = 62973792.

The previous prime is 63161489. The next prime is 63161587. The reversal of 63161551 is 15516136.

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 63161551 - 2¹⁵ = 63128783 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63161251) 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, 93375 + ... + 94048.

It is an arithmetic number, because the mean of its divisors is an integer number (15837328).

Almost surely, 2^63161551 is an apocalyptic number.

63161551 is a deficient number, since it is larger than the sum of its proper divisors (187761).

63161551 is a wasteful number, since it uses less digits than its factorization.

63161551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 187760.

The product of its digits is 2700, while the sum is 28.

The square root of 63161551 is about 7947.4241739069. The cubic root of 63161551 is about 398.2455472396.

Adding to 63161551 its reverse (15516136), we get a palindrome (78677687).

The spelling of 63161551 in words is "sixty-three million, one hundred sixty-one thousand, five hundred fifty-one".