51690074 has 8 divisors (see below), whose sum is σ = 77622240. Its totient is φ = 25815996.

The previous prime is 51690049. The next prime is 51690097. The reversal of 51690074 is 47009615.

It is a happy number.

51690074 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.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 51690074.

It is an unprimeable number.

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, 12224 + ... + 15899.

It is an arithmetic number, because the mean of its divisors is an integer number (9702780).

Almost surely, 2^51690074 is an apocalyptic number.

51690074 is a deficient number, since it is larger than the sum of its proper divisors (25932166).

51690074 is a wasteful number, since it uses less digits than its factorization.

51690074 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29044.

The product of its (nonzero) digits is 7560, while the sum is 32.

The square root of 51690074 is about 7189.5809335454. The cubic root of 51690074 is about 372.5080976574.

Adding to 51690074 its reverse (47009615), we get a palindrome (98699689).

The spelling of 51690074 in words is "fifty-one million, six hundred ninety thousand, seventy-four".