51133242 has 8 divisors (see below), whose sum is σ = 102266496. Its totient is φ = 17044412.

The previous prime is 51133241. The next prime is 51133279. The reversal of 51133242 is 24233115.

51133242 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

51133242 is an admirable number.

It is a super-2 number, since 2×51133242² = 5229216874861128, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (51133241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4261098 + ... + 4261109.

It is an arithmetic number, because the mean of its divisors is an integer number (12783312).

Almost surely, 2^51133242 is an apocalyptic number.

51133242 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

51133242 is a wasteful number, since it uses less digits than its factorization.

51133242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8522212.

The product of its digits is 720, while the sum is 21.

The square root of 51133242 is about 7150.7511493549. The cubic root of 51133242 is about 371.1656494190.

Adding to 51133242 its reverse (24233115), we get a palindrome (75366357).

The spelling of 51133242 in words is "fifty-one million, one hundred thirty-three thousand, two hundred forty-two".