51663158 has 4 divisors (see below), whose sum is σ = 77494740. Its totient is φ = 25831578.

The previous prime is 51663149. The next prime is 51663179. The reversal of 51663158 is 85136615.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12915788 + ... + 12915791.

It is an arithmetic number, because the mean of its divisors is an integer number (19373685).

Almost surely, 2^51663158 is an apocalyptic number.

51663158 is a deficient number, since it is larger than the sum of its proper divisors (25831582).

51663158 is a wasteful number, since it uses less digits than its factorization.

51663158 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25831581.

The product of its digits is 21600, while the sum is 35.

The square root of 51663158 is about 7187.7088143580. The cubic root of 51663158 is about 372.4434290921.

The spelling of 51663158 in words is "fifty-one million, six hundred sixty-three thousand, one hundred fifty-eight".