52657487 has 4 divisors (see below), whose sum is σ = 52685976. Its totient is φ = 52629000.

The previous prime is 52657481. The next prime is 52657513. The reversal of 52657487 is 78475625.

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 52657487 - 2⁴ = 52657471 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (52657481) 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, 11264 + ... + 15237.

It is an arithmetic number, because the mean of its divisors is an integer number (13171494).

Almost surely, 2^52657487 is an apocalyptic number.

52657487 is a deficient number, since it is larger than the sum of its proper divisors (28489).

52657487 is a wasteful number, since it uses less digits than its factorization.

52657487 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28488.

The product of its digits is 470400, while the sum is 44.

The square root of 52657487 is about 7256.5478707165. The cubic root of 52657487 is about 374.8176583147.

The spelling of 52657487 in words is "fifty-two million, six hundred fifty-seven thousand, four hundred eighty-seven".