53139237 has 8 divisors (see below), whose sum is σ = 70919904. Its totient is φ = 35392368.

The previous prime is 53139227. The next prime is 53139253. The reversal of 53139237 is 73293135.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 53139237 - 2¹² = 53135141 is a prime.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 53139198 and 53139207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53139217) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4518 + ... + 11255.

It is an arithmetic number, because the mean of its divisors is an integer number (8864988).

Almost surely, 2^53139237 is an apocalyptic number.

It is an amenable number.

53139237 is a deficient number, since it is larger than the sum of its proper divisors (17780667).

53139237 is a wasteful number, since it uses less digits than its factorization.

53139237 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16899.

The product of its digits is 17010, while the sum is 33.

The square root of 53139237 is about 7289.6664532748. Note that the first 3 decimals coincide. The cubic root of 53139237 is about 375.9572273851.

The spelling of 53139237 in words is "fifty-three million, one hundred thirty-nine thousand, two hundred thirty-seven".