55520313 has 16 divisors (see below), whose sum is σ = 76443840. Its totient is φ = 35816256.

The previous prime is 55520293. The next prime is 55520323. The reversal of 55520313 is 31302555.

It is not a de Polignac number, because 55520313 - 2⁵ = 55520281 is a prime.

It is not an unprimeable number, because it can be changed into a prime (55520323) 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, 20598 + ... + 23136.

It is an arithmetic number, because the mean of its divisors is an integer number (4777740).

Almost surely, 2^55520313 is an apocalyptic number.

It is an amenable number.

55520313 is a deficient number, since it is larger than the sum of its proper divisors (20923527).

55520313 is a wasteful number, since it uses less digits than its factorization.

55520313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2776.

The product of its (nonzero) digits is 2250, while the sum is 24.

The square root of 55520313 is about 7451.1954074497. The cubic root of 55520313 is about 381.4907118065.

Adding to 55520313 its reverse (31302555), we get a palindrome (86822868).

The spelling of 55520313 in words is "fifty-five million, five hundred twenty thousand, three hundred thirteen".