53015720 has 32 divisors (see below), whose sum is σ = 119577600. Its totient is φ = 21154368.

The previous prime is 53015687. The next prime is 53015723. The reversal of 53015720 is 2751035.

It is not an unprimeable number, because it can be changed into a prime (53015723) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17777 + ... + 20543.

It is an arithmetic number, because the mean of its divisors is an integer number (3736800).

Almost surely, 2^53015720 is an apocalyptic number.

It is an amenable number.

53015720 is an abundant number, since it is smaller than the sum of its proper divisors (66561880).

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

53015720 is a wasteful number, since it uses less digits than its factorization.

53015720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3257 (or 3253 counting only the distinct ones).

The product of its (nonzero) digits is 1050, while the sum is 23.

The square root of 53015720 is about 7281.1894632677. The cubic root of 53015720 is about 375.6657093686.

Adding to 53015720 its reverse (2751035), we get a palindrome (55766755).

It can be divided in two parts, 53015 and 720, that added together give a palindrome (53735).

The spelling of 53015720 in words is "fifty-three million, fifteen thousand, seven hundred twenty".