55316521 has 8 divisors (see below), whose sum is σ = 63076104. Its totient is φ = 48057600.

The previous prime is 55316483. The next prime is 55316557. The reversal of 55316521 is 12561355.

It can be written as a sum of positive squares in 4 ways, for example, as 14356521 + 40960000 = 3789^2 + 6400^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 55316521 - 2¹¹ = 55314473 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 55316521.

It is not an unprimeable number, because it can be changed into a prime (55314521) 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, 124930 + ... + 125371.

It is an arithmetic number, because the mean of its divisors is an integer number (7884513).

Almost surely, 2^55316521 is an apocalyptic number.

It is an amenable number.

55316521 is a deficient number, since it is larger than the sum of its proper divisors (7759583).

55316521 is a wasteful number, since it uses less digits than its factorization.

55316521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 250331.

The product of its digits is 4500, while the sum is 28.

The square root of 55316521 is about 7437.5077142817. The cubic root of 55316521 is about 381.0233749089.

Adding to 55316521 its reverse (12561355), we get a palindrome (67877876).

The spelling of 55316521 in words is "fifty-five million, three hundred sixteen thousand, five hundred twenty-one".