53313320 has 16 divisors (see below), whose sum is σ = 119955060. Its totient is φ = 21325312.

The previous prime is 53313301. The next prime is 53313331. The reversal of 53313320 is 2331335.

It can be written as a sum of positive squares in 2 ways, for example, as 47251876 + 6061444 = 6874^2 + 2462^2 .

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 53313292 and 53313301.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 666377 + ... + 666456.

Almost surely, 2^53313320 is an apocalyptic number.

It is an amenable number.

53313320 is an abundant number, since it is smaller than the sum of its proper divisors (66641740).

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

53313320 is a wasteful number, since it uses less digits than its factorization.

53313320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1332844 (or 1332840 counting only the distinct ones).

The product of its (nonzero) digits is 810, while the sum is 20.

The square root of 53313320 is about 7301.5970855697. The cubic root of 53313320 is about 376.3673224926.

Adding to 53313320 its reverse (2331335), we get a palindrome (55644655).

The spelling of 53313320 in words is "fifty-three million, three hundred thirteen thousand, three hundred twenty".