55236520 has 16 divisors (see below), whose sum is σ = 124282260. Its totient is φ = 22094592.

The previous prime is 55236499. The next prime is 55236527. The reversal of 55236520 is 2563255.

It can be written as a sum of positive squares in 2 ways, for example, as 47914084 + 7322436 = 6922^2 + 2706^2 .

It is not an unprimeable number, because it can be changed into a prime (55236527) 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, 690417 + ... + 690496.

Almost surely, 2^55236520 is an apocalyptic number.

It is an amenable number.

55236520 is an abundant number, since it is smaller than the sum of its proper divisors (69045740).

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

55236520 is a wasteful number, since it uses less digits than its factorization.

55236520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1380924 (or 1380920 counting only the distinct ones).

The product of its (nonzero) digits is 9000, while the sum is 28.

The square root of 55236520 is about 7432.1275554178. The cubic root of 55236520 is about 380.8396024592.

Adding to 55236520 its reverse (2563255), we get a palindrome (57799775).

The spelling of 55236520 in words is "fifty-five million, two hundred thirty-six thousand, five hundred twenty".