53120261 has 4 divisors (see below), whose sum is σ = 53260800. Its totient is φ = 52979724.

The previous prime is 53120251. The next prime is 53120303. The reversal of 53120261 is 16202135.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-53120261 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 (53120231) 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 3 ways as a sum of consecutive naturals, for example, 69701 + ... + 70458.

It is an arithmetic number, because the mean of its divisors is an integer number (13315200).

Almost surely, 2^53120261 is an apocalyptic number.

It is an amenable number.

53120261 is a deficient number, since it is larger than the sum of its proper divisors (140539).

53120261 is a wasteful number, since it uses less digits than its factorization.

53120261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 140538.

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

The square root of 53120261 is about 7288.3647685884. The cubic root of 53120261 is about 375.9124706660.

Adding to 53120261 its reverse (16202135), we get a palindrome (69322396).

The spelling of 53120261 in words is "fifty-three million, one hundred twenty thousand, two hundred sixty-one".