53278278 has 32 divisors (see below), whose sum is σ = 111144960. Its totient is φ = 17004960.

The previous prime is 53278271. The next prime is 53278319. The reversal of 53278278 is 87287235.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53278271) 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, 20893 + ... + 23303.

It is an arithmetic number, because the mean of its divisors is an integer number (3473280).

Almost surely, 2^53278278 is an apocalyptic number.

53278278 is a gapful number since it is divisible by the number (58) formed by its first and last digit.

53278278 is an abundant number, since it is smaller than the sum of its proper divisors (57866682).

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

53278278 is a wasteful number, since it uses less digits than its factorization.

53278278 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2572.

The product of its digits is 188160, while the sum is 42.

The square root of 53278278 is about 7299.1970791314. The cubic root of 53278278 is about 376.2848443280.

The spelling of 53278278 in words is "fifty-three million, two hundred seventy-eight thousand, two hundred seventy-eight".