53156261 has 4 divisors (see below), whose sum is σ = 53450124. Its totient is φ = 52862400.

The previous prime is 53156251. The next prime is 53156269. The reversal of 53156261 is 16265135.

53156261 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, and also an emirpimes, since its reverse is a distinct semiprime: 16265135 = 5 ⋅3253027.

It can be written as a sum of positive squares in 2 ways, for example, as 9728161 + 43428100 = 3119^2 + 6590^2 .

It is a cyclic number.

It is not a de Polignac number, because 53156261 - 2¹⁸ = 52894117 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53156269) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 146660 + ... + 147021.

It is an arithmetic number, because the mean of its divisors is an integer number (13362531).

Almost surely, 2^53156261 is an apocalyptic number.

It is an amenable number.

53156261 is a deficient number, since it is larger than the sum of its proper divisors (293863).

53156261 is a wasteful number, since it uses less digits than its factorization.

53156261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 293862.

The product of its digits is 5400, while the sum is 29.

The square root of 53156261 is about 7290.8340400807. The cubic root of 53156261 is about 375.9973710583.

The spelling of 53156261 in words is "fifty-three million, one hundred fifty-six thousand, two hundred sixty-one".