53888515321 has 9 divisors (see below), whose sum is σ = 56338944879. Its totient is φ = 51540429336.

The previous prime is 53888515313. The next prime is 53888515361. The reversal of 53888515321 is 12351588835.

It is a happy number.

The square root of 53888515321 is 232139.

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

It can be written as a sum of positive squares in only one way, i.e., 27461461225 + 26427054096 = 165715^2 + 162564^2 .

It is not a de Polignac number, because 53888515321 - 2³ = 53888515313 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (53888515301) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 5334151 + ... + 5344243.

Almost surely, 2^53888515321 is an apocalyptic number.

53888515321 is the 232139-th square number.

53888515321 is the 116070-th centered octagonal number.

It is an amenable number.

53888515321 is a deficient number, since it is larger than the sum of its proper divisors (2450429558).

53888515321 is an frugal number, since it uses more digits than its factorization.

53888515321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20232 (or 10116 counting only the distinct ones).

The product of its digits is 1152000, while the sum is 49.

Multiplying 53888515321 by its sum of digits (49), we get a square (2640537250729 = 1624973²).

The spelling of 53888515321 in words is "fifty-three billion, eight hundred eighty-eight million, five hundred fifteen thousand, three hundred twenty-one".