53039381 has 4 divisors (see below), whose sum is σ = 53395500. Its totient is φ = 52683264.

The previous prime is 53039353. The next prime is 53039387. The reversal of 53039381 is 18393035.

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

It can be written as a sum of positive squares in 2 ways, for example, as 12602500 + 40436881 = 3550^2 + 6359^2 .

It is a cyclic number.

It is not a de Polignac number, because 53039381 - 2¹⁰ = 53038357 is a prime.

It is a super-2 number, since 2×53039381² = 5626351873726322, 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 (53039387) 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, 177836 + ... + 178133.

It is an arithmetic number, because the mean of its divisors is an integer number (13348875).

Almost surely, 2^53039381 is an apocalyptic number.

It is an amenable number.

53039381 is a deficient number, since it is larger than the sum of its proper divisors (356119).

53039381 is a wasteful number, since it uses less digits than its factorization.

53039381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 356118.

The product of its (nonzero) digits is 9720, while the sum is 32.

The square root of 53039381 is about 7282.8140852283. The cubic root of 53039381 is about 375.7215877907.

The spelling of 53039381 in words is "fifty-three million, thirty-nine thousand, three hundred eighty-one".