53647257 has 16 divisors (see below), whose sum is σ = 77352192. Its totient is φ = 32943360.

The previous prime is 53647211. The next prime is 53647259. The reversal of 53647257 is 75274635.

It is not a de Polignac number, because 53647257 - 2¹⁰ = 53646233 is a prime.

It is not an unprimeable number, because it can be changed into a prime (53647259) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8794 + ... + 13587.

It is an arithmetic number, because the mean of its divisors is an integer number (4834512).

Almost surely, 2^53647257 is an apocalyptic number.

It is an amenable number.

53647257 is a deficient number, since it is larger than the sum of its proper divisors (23704935).

53647257 is a wasteful number, since it uses less digits than its factorization.

53647257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22448.

The product of its digits is 176400, while the sum is 39.

The square root of 53647257 is about 7324.4287831885. The cubic root of 53647257 is about 377.1515009538.

It can be divided in two parts, 5364 and 7257, that added together give a palindrome (12621).

The spelling of 53647257 in words is "fifty-three million, six hundred forty-seven thousand, two hundred fifty-seven".