53128137 has 8 divisors (see below), whose sum is σ = 73917504. Its totient is φ = 33878768.

The previous prime is 53128109. The next prime is 53128139. The reversal of 53128137 is 73182135.

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

It is a cyclic number.

It is not a de Polignac number, because 53128137 - 2⁶ = 53128073 is a prime.

It is not an unprimeable number, because it can be changed into a prime (53128139) 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, 384918 + ... + 385055.

It is an arithmetic number, because the mean of its divisors is an integer number (9239688).

Almost surely, 2^53128137 is an apocalyptic number.

It is an amenable number.

53128137 is a deficient number, since it is larger than the sum of its proper divisors (20789367).

53128137 is a wasteful number, since it uses less digits than its factorization.

53128137 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 769999.

The product of its digits is 5040, while the sum is 30.

The square root of 53128137 is about 7288.9050618046. The cubic root of 53128137 is about 375.9310482624.

The spelling of 53128137 in words is "fifty-three million, one hundred twenty-eight thousand, one hundred thirty-seven".