63515423 has 12 divisors (see below), whose sum is σ = 69357240. Its totient is φ = 58088016.

The previous prime is 63515411. The next prime is 63515453. The reversal of 63515423 is 32451536.

It is not a de Polignac number, because 63515423 - 2¹⁴ = 63499039 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (29).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63515453) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7436 + ... + 13502.

It is an arithmetic number, because the mean of its divisors is an integer number (5779770).

Almost surely, 2^63515423 is an apocalyptic number.

63515423 is a deficient number, since it is larger than the sum of its proper divisors (5841817).

63515423 is a wasteful number, since it uses less digits than its factorization.

63515423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6134 (or 6115 counting only the distinct ones).

The product of its digits is 10800, while the sum is 29.

The square root of 63515423 is about 7969.6563915893. The cubic root of 63515423 is about 398.9879059070.

Adding to 63515423 its reverse (32451536), we get a palindrome (95966959).

The spelling of 63515423 in words is "sixty-three million, five hundred fifteen thousand, four hundred twenty-three".