51142402 has 8 divisors (see below), whose sum is σ = 76862412. Its totient is φ = 25521600.

The previous prime is 51142387. The next prime is 51142411. The reversal of 51142402 is 20424115.

It can be written as a sum of positive squares in 2 ways, for example, as 50566321 + 576081 = 7111^2 + 759^2 .

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

It is a self number, because there is not a number n which added to its sum of digits gives 51142402.

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, 23499 + ... + 25582.

Almost surely, 2^51142402 is an apocalyptic number.

51142402 is a deficient number, since it is larger than the sum of its proper divisors (25720010).

51142402 is a wasteful number, since it uses less digits than its factorization.

51142402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49604.

The product of its (nonzero) digits is 320, while the sum is 19.

The square root of 51142402 is about 7151.3916128261. The cubic root of 51142402 is about 371.1878116121.

Adding to 51142402 its reverse (20424115), we get a palindrome (71566517).

The spelling of 51142402 in words is "fifty-one million, one hundred forty-two thousand, four hundred two".