253247543 has 4 divisors (see below), whose sum is σ = 254233200. Its totient is φ = 252261888.

The previous prime is 253247531. The next prime is 253247551. The reversal of 253247543 is 345742352.

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

It is a cyclic number.

It is not a de Polignac number, because 253247543 - 2⁸ = 253247287 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (253247513) 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, 492443 + ... + 492956.

It is an arithmetic number, because the mean of its divisors is an integer number (63558300).

Almost surely, 2^253247543 is an apocalyptic number.

253247543 is a deficient number, since it is larger than the sum of its proper divisors (985657).

253247543 is an equidigital number, since it uses as much as digits as its factorization.

253247543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 985656.

The product of its digits is 100800, while the sum is 35.

The square root of 253247543 is about 15913.7532656504. The cubic root of 253247543 is about 632.6765632672.

Adding to 253247543 its reverse (345742352), we get a palindrome (598989895).

The spelling of 253247543 in words is "two hundred fifty-three million, two hundred forty-seven thousand, five hundred forty-three".