53111818 has 16 divisors (see below), whose sum is σ = 83349000. Its totient is φ = 25349632.

The previous prime is 53111813. The next prime is 53111819. The reversal of 53111818 is 81811135.

It can be written as a sum of positive squares in 4 ways, for example, as 47789569 + 5322249 = 6913^2 + 2307^2 .

It is a super-2 number, since 2×53111818² = 5641730422530248, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (53111813) 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 7 ways as a sum of consecutive naturals, for example, 18 + ... + 10306.

Almost surely, 2^53111818 is an apocalyptic number.

53111818 is a gapful number since it is divisible by the number (58) formed by its first and last digit.

53111818 is a deficient number, since it is larger than the sum of its proper divisors (30237182).

53111818 is a wasteful number, since it uses less digits than its factorization.

53111818 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10409.

The product of its digits is 960, while the sum is 28.

The square root of 53111818 is about 7287.7855347149. The cubic root of 53111818 is about 375.8925536130.

The spelling of 53111818 in words is "fifty-three million, one hundred eleven thousand, eight hundred eighteen".