53031257 has 4 divisors (see below), whose sum is σ = 53051700. Its totient is φ = 53010816.

The previous prime is 53031221. The next prime is 53031259. The reversal of 53031257 is 75213035.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 8462281 + 44568976 = 2909^2 + 6676^2 .

It is a cyclic number.

It is not a de Polignac number, because 53031257 - 2¹⁴ = 53014873 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (53031259) 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, 5648 + ... + 11745.

It is an arithmetic number, because the mean of its divisors is an integer number (13262925).

Almost surely, 2^53031257 is an apocalyptic number.

It is an amenable number.

53031257 is a deficient number, since it is larger than the sum of its proper divisors (20443).

53031257 is a wasteful number, since it uses less digits than its factorization.

53031257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20442.

The product of its (nonzero) digits is 3150, while the sum is 26.

The square root of 53031257 is about 7282.2563124350. The cubic root of 53031257 is about 375.7024038185.

The spelling of 53031257 in words is "fifty-three million, thirty-one thousand, two hundred fifty-seven".