63855131 has 4 divisors (see below), whose sum is σ = 63886272. Its totient is φ = 63823992.

The previous prime is 63855091. The next prime is 63855149. The reversal of 63855131 is 13155836.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-63855131 is a prime.

It is a super-2 number, since 2×63855131² = 8154955510054322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (63855161) 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, 12260 + ... + 16673.

It is an arithmetic number, because the mean of its divisors is an integer number (15971568).

Almost surely, 2^63855131 is an apocalyptic number.

63855131 is a deficient number, since it is larger than the sum of its proper divisors (31141).

63855131 is a wasteful number, since it uses less digits than its factorization.

63855131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31140.

The product of its digits is 10800, while the sum is 32.

The square root of 63855131 is about 7990.9405579068. The cubic root of 63855131 is about 399.6979615727.

The spelling of 63855131 in words is "sixty-three million, eight hundred fifty-five thousand, one hundred thirty-one".