63155121 has 4 divisors (see below), whose sum is σ = 84206832. Its totient is φ = 42103412.

The previous prime is 63155117. The next prime is 63155123. The reversal of 63155121 is 12155136.

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 a cyclic number.

It is not a de Polignac number, because 63155121 - 2² = 63155117 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 63155091 and 63155100.

It is not an unprimeable number, because it can be changed into a prime (63155123) 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, 10525851 + ... + 10525856.

It is an arithmetic number, because the mean of its divisors is an integer number (21051708).

Almost surely, 2^63155121 is an apocalyptic number.

It is an amenable number.

63155121 is a deficient number, since it is larger than the sum of its proper divisors (21051711).

63155121 is a wasteful number, since it uses less digits than its factorization.

63155121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21051710.

The product of its digits is 900, while the sum is 24.

The square root of 63155121 is about 7947.0196300248. The cubic root of 63155121 is about 398.2320326582.

The spelling of 63155121 in words is "sixty-three million, one hundred fifty-five thousand, one hundred twenty-one".