53130572581 has 4 divisors (see below), whose sum is σ = 53153585100. Its totient is φ = 53107560064.

The previous prime is 53130572569. The next prime is 53130572591. The reversal of 53130572581 is 18527503135.

53130572581 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 32775843681 + 20354728900 = 181041^2 + 142670^2 .

It is a cyclic number.

It is not a de Polignac number, because 53130572581 - 2²³ = 53122183973 is a prime.

It is a super-2 number, since 2×53130572581² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53130572531) 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, 11502796 + ... + 11507413.

It is an arithmetic number, because the mean of its divisors is an integer number (13288396275).

Almost surely, 2^53130572581 is an apocalyptic number.

It is an amenable number.

53130572581 is a deficient number, since it is larger than the sum of its proper divisors (23012519).

53130572581 is a wasteful number, since it uses less digits than its factorization.

53130572581 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23012518.

The product of its (nonzero) digits is 126000, while the sum is 40.

The spelling of 53130572581 in words is "fifty-three billion, one hundred thirty million, five hundred seventy-two thousand, five hundred eighty-one".