51333442 has 8 divisors (see below), whose sum is σ = 77046156. Its totient is φ = 25651392.

The previous prime is 51333431. The next prime is 51333461. The reversal of 51333442 is 24433315.

It can be written as a sum of positive squares in 2 ways, for example, as 50253921 + 1079521 = 7089^2 + 1039^2 .

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

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 in 3 ways as a sum of consecutive naturals, for example, 2883 + ... + 10534.

Almost surely, 2^51333442 is an apocalyptic number.

51333442 is a deficient number, since it is larger than the sum of its proper divisors (25712714).

51333442 is a wasteful number, since it uses less digits than its factorization.

51333442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15332.

The product of its digits is 4320, while the sum is 25.

The square root of 51333442 is about 7164.7360035105. The cubic root of 51333442 is about 371.6494220942.

Adding to 51333442 its reverse (24433315), we get a palindrome (75766757).

The spelling of 51333442 in words is "fifty-one million, three hundred thirty-three thousand, four hundred forty-two".