53021261 has 8 divisors (see below), whose sum is σ = 54082104. Its totient is φ = 51966720.

The previous prime is 53021239. The next prime is 53021291. The reversal of 53021261 is 16212035.

It can be written as a sum of positive squares in 4 ways, for example, as 10118761 + 42902500 = 3181^2 + 6550^2 .

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 53021261 - 2²² = 48826957 is a prime.

It is a super-2 number, since 2×53021261² = 5622508236060242, which 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 (53021201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17705 + ... + 20481.

It is an arithmetic number, because the mean of its divisors is an integer number (6760263).

Almost surely, 2^53021261 is an apocalyptic number.

It is an amenable number.

53021261 is a deficient number, since it is larger than the sum of its proper divisors (1060843).

53021261 is a wasteful number, since it uses less digits than its factorization.

53021261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3151.

The product of its (nonzero) digits is 360, while the sum is 20.

The square root of 53021261 is about 7281.5699543436. The cubic root of 53021261 is about 375.6787966264.

Adding to 53021261 its reverse (16212035), we get a palindrome (69233296).

The spelling of 53021261 in words is "fifty-three million, twenty-one thousand, two hundred sixty-one".