53817257 has 8 divisors (see below), whose sum is σ = 61366536. Its totient is φ = 46755072.

The previous prime is 53817233. The next prime is 53817293. The reversal of 53817257 is 75271835.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 361 + 53816896 = 19^2 + 7336^2 .

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

It is not a de Polignac number, because 53817257 - 2¹² = 53813161 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 53817257.

It is not an unprimeable number, because it can be changed into a prime (53817157) 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, 121538 + ... + 121979.

It is an arithmetic number, because the mean of its divisors is an integer number (7670817).

Almost surely, 2^53817257 is an apocalyptic number.

It is an amenable number.

53817257 is a deficient number, since it is larger than the sum of its proper divisors (7549279).

53817257 is a wasteful number, since it uses less digits than its factorization.

53817257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 243547.

The product of its digits is 58800, while the sum is 38.

The square root of 53817257 is about 7336.0246046479. The cubic root of 53817257 is about 377.5494594787.

The spelling of 53817257 in words is "fifty-three million, eight hundred seventeen thousand, two hundred fifty-seven".