52447257 has 20 divisors (see below), whose sum is σ = 80878336. Its totient is φ = 33835320.

The previous prime is 52447249. The next prime is 52447259. The reversal of 52447257 is 75274425.

It is a happy number.

It is not a de Polignac number, because 52447257 - 2³ = 52447249 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (52447259) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 7933 + ... + 12954.

Almost surely, 2^52447257 is an apocalyptic number.

It is an amenable number.

52447257 is a deficient number, since it is larger than the sum of its proper divisors (28431079).

52447257 is a wasteful number, since it uses less digits than its factorization.

52447257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20930 (or 20921 counting only the distinct ones).

The product of its digits is 78400, while the sum is 36.

The square root of 52447257 is about 7242.0478457409. The cubic root of 52447257 is about 374.3181850938.

The spelling of 52447257 in words is "fifty-two million, four hundred forty-seven thousand, two hundred fifty-seven".