51233986 has 8 divisors (see below), whose sum is σ = 76881420. Its totient is φ = 25606848.

The previous prime is 51233983. The next prime is 51233999. The reversal of 51233986 is 68933215.

It can be written as a sum of positive squares in 2 ways, for example, as 36372961 + 14861025 = 6031^2 + 3855^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (51233983) by changing a digit.

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 in 3 ways as a sum of consecutive naturals, for example, 6750 + ... + 12166.

Almost surely, 2^51233986 is an apocalyptic number.

51233986 is a deficient number, since it is larger than the sum of its proper divisors (25647434).

51233986 is a wasteful number, since it uses less digits than its factorization.

51233986 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10148.

The product of its digits is 38880, while the sum is 37.

The square root of 51233986 is about 7157.7919779776. The cubic root of 51233986 is about 371.4092494739.

The spelling of 51233986 in words is "fifty-one million, two hundred thirty-three thousand, nine hundred eighty-six".