63155513 has 4 divisors (see below), whose sum is σ = 63175668. Its totient is φ = 63135360.

The previous prime is 63155507. The next prime is 63155531. The reversal of 63155513 is 31555136.

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

It can be written as a sum of positive squares in 2 ways, for example, as 52606009 + 10549504 = 7253^2 + 3248^2 .

It is a cyclic number.

It is not a de Polignac number, because 63155513 - 2⁴ = 63155497 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (63155413) 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, 4256 + ... + 12017.

It is an arithmetic number, because the mean of its divisors is an integer number (15793917).

Almost surely, 2^63155513 is an apocalyptic number.

It is an amenable number.

63155513 is a deficient number, since it is larger than the sum of its proper divisors (20155).

63155513 is a wasteful number, since it uses less digits than its factorization.

63155513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20154.

The product of its digits is 6750, while the sum is 29.

The square root of 63155513 is about 7947.0442933206. The cubic root of 63155513 is about 398.2328565905.

The spelling of 63155513 in words is "sixty-three million, one hundred fifty-five thousand, five hundred thirteen".