55116520 has 16 divisors (see below), whose sum is σ = 124012260. Its totient is φ = 22046592.

The previous prime is 55116493. The next prime is 55116521. The reversal of 55116520 is 2561155.

It can be written as a sum of positive squares in 2 ways, for example, as 52446564 + 2669956 = 7242^2 + 1634^2 .

It is not an unprimeable number, because it can be changed into a prime (55116521) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 688917 + ... + 688996.

Almost surely, 2^55116520 is an apocalyptic number.

It is an amenable number.

55116520 is an abundant number, since it is smaller than the sum of its proper divisors (68895740).

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

55116520 is a wasteful number, since it uses less digits than its factorization.

55116520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1377924 (or 1377920 counting only the distinct ones).

The product of its (nonzero) digits is 1500, while the sum is 25.

The square root of 55116520 is about 7424.0501075895. The cubic root of 55116520 is about 380.5636142369.

Adding to 55116520 its reverse (2561155), we get a palindrome (57677675).

It can be divided in two parts, 551 and 16520, that added together give a palindrome (17071).

The spelling of 55116520 in words is "fifty-five million, one hundred sixteen thousand, five hundred twenty".