51750978 has 32 divisors (see below), whose sum is σ = 105364800. Its totient is φ = 16943040.

The previous prime is 51750971. The next prime is 51750991. The reversal of 51750978 is 87905715.

It is not an unprimeable number, because it can be changed into a prime (51750971) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 95388 + ... + 95928.

It is an arithmetic number, because the mean of its divisors is an integer number (3292650).

Almost surely, 2^51750978 is an apocalyptic number.

51750978 is an abundant number, since it is smaller than the sum of its proper divisors (53613822).

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

51750978 is a wasteful number, since it uses less digits than its factorization.

51750978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 802.

The product of its (nonzero) digits is 88200, while the sum is 42.

The square root of 51750978 is about 7193.8152603469. The cubic root of 51750978 is about 372.6543431988.

The spelling of 51750978 in words is "fifty-one million, seven hundred fifty thousand, nine hundred seventy-eight".