53318778 has 16 divisors (see below), whose sum is σ = 109238976. Its totient is φ = 17339360.

The previous prime is 53318777. The next prime is 53318789. The reversal of 53318778 is 87781335.

It is not an unprimeable number, because it can be changed into a prime (53318777) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 108126 + ... + 108617.

It is an arithmetic number, because the mean of its divisors is an integer number (6827436).

Almost surely, 2^53318778 is an apocalyptic number.

53318778 is an abundant number, since it is smaller than the sum of its proper divisors (55920198).

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

53318778 is a wasteful number, since it uses less digits than its factorization.

53318778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 216789.

The product of its digits is 141120, while the sum is 42.

The square root of 53318778 is about 7301.9708298513. The cubic root of 53318778 is about 376.3801657042.

The spelling of 53318778 in words is "fifty-three million, three hundred eighteen thousand, seven hundred seventy-eight".