51533778 has 16 divisors (see below), whose sum is σ = 103138560. Its totient is φ = 17166096.

The previous prime is 51533743. The next prime is 51533789. The reversal of 51533778 is 87733515.

51533778 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 7 ways as a sum of consecutive naturals, for example, 13663 + ... + 17021.

It is an arithmetic number, because the mean of its divisors is an integer number (6446160).

Almost surely, 2^51533778 is an apocalyptic number.

51533778 is an abundant number, since it is smaller than the sum of its proper divisors (51604782).

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

51533778 is a wasteful number, since it uses less digits than its factorization.

51533778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5921.

The product of its digits is 88200, while the sum is 39.

The square root of 51533778 is about 7178.7030862127. The cubic root of 51533778 is about 372.1322659509.

The spelling of 51533778 in words is "fifty-one million, five hundred thirty-three thousand, seven hundred seventy-eight".