Search a number
53051688428281 = 72836592

53051688428281 has 3 divisors (see below), whose sum is σ = 53051695711941. Its totient is φ = 53051681144622.

The previous prime is 53051688428273. The next prime is 53051688428329. The reversal of 53051688428281 is 18282488615035.

It can be divided in two parts, 53051688 and 428281, that added together give a square (53479969 = 73132).

The square root of 53051688428281 is 7283659.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is not a de Polignac number, because 53051688428281 - 23 = 53051688428273 is a prime.

It is a super-2 number, since 2×530516884282812 (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (53051688428231) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 3641830 + ... + 10925488.

It is an arithmetic number, because the mean of its divisors is an integer number (17683898570647).

Almost surely, 253051688428281 is an apocalyptic number.

53051688428281 is the 7283659-th square number.

53051688428281 is the 3641830-th centered octagonal number.

It is an amenable number.

53051688428281 is a deficient number, since it is larger than the sum of its proper divisors (7283660).

53051688428281 is an frugal number, since it uses more digits than its factorization.

53051688428281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14567318 (or 7283659 counting only the distinct ones).

The product of its (nonzero) digits is 29491200, while the sum is 61.

The spelling of 53051688428281 in words is "fifty-three trillion, fifty-one billion, six hundred eighty-eight million, four hundred twenty-eight thousand, two hundred eighty-one".

Divisors: 1 7283659 53051688428281