53128311 has 4 divisors (see below), whose sum is σ = 70837752. Its totient is φ = 35418872.

The previous prime is 53128301. The next prime is 53128357. The reversal of 53128311 is 11382135.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 53128311 - 2⁵ = 53128279 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53128301) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8854716 + ... + 8854721.

It is an arithmetic number, because the mean of its divisors is an integer number (17709438).

Almost surely, 2^53128311 is an apocalyptic number.

53128311 is a deficient number, since it is larger than the sum of its proper divisors (17709441).

53128311 is a wasteful number, since it uses less digits than its factorization.

53128311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17709440.

The product of its digits is 720, while the sum is 24.

The square root of 53128311 is about 7288.9169977439. The cubic root of 53128311 is about 375.9314586660.

The spelling of 53128311 in words is "fifty-three million, one hundred twenty-eight thousand, three hundred eleven".