538143457 has 4 divisors (see below), whose sum is σ = 538380036. Its totient is φ = 537906880.

The previous prime is 538143451. The next prime is 538143469. The reversal of 538143457 is 754341835.

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 449482401 + 88661056 = 21201^2 + 9416^2 .

It is a cyclic number.

It is not a de Polignac number, because 538143457 - 2⁷ = 538143329 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (538143451) 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, 114844 + ... + 119437.

It is an arithmetic number, because the mean of its divisors is an integer number (134595009).

Almost surely, 2^538143457 is an apocalyptic number.

It is an amenable number.

538143457 is a deficient number, since it is larger than the sum of its proper divisors (236579).

538143457 is a wasteful number, since it uses less digits than its factorization.

538143457 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 236578.

The product of its digits is 201600, while the sum is 40.

The square root of 538143457 is about 23197.9192385869. The cubic root of 538143457 is about 813.3909851001.

The spelling of 538143457 in words is "five hundred thirty-eight million, one hundred forty-three thousand, four hundred fifty-seven".