51693075 has 72 divisors (see below), whose sum is σ = 110492928. Its totient is φ = 22587840.

The previous prime is 51693067. The next prime is 51693077. The reversal of 51693075 is 57039615.

It is a happy number.

It is not a de Polignac number, because 51693075 - 2³ = 51693067 is a prime.

It is not an unprimeable number, because it can be changed into a prime (51693077) 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 71 ways as a sum of consecutive naturals, for example, 35512 + ... + 36938.

It is an arithmetic number, because the mean of its divisors is an integer number (1534624).

Almost surely, 2^51693075 is an apocalyptic number.

51693075 is an abundant number, since it is smaller than the sum of its proper divisors (58799853).

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

51693075 is a wasteful number, since it uses less digits than its factorization.

51693075 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1473 (or 1465 counting only the distinct ones).

The product of its (nonzero) digits is 28350, while the sum is 36.

The square root of 51693075 is about 7189.7896353092. The cubic root of 51693075 is about 372.5153064893.

The spelling of 51693075 in words is "fifty-one million, six hundred ninety-three thousand, seventy-five".