143125531 has 2 divisors, whose sum is σ = 143125532. Its totient is φ = 143125530.

The previous prime is 143125517. The next prime is 143125559. The reversal of 143125531 is 135521341.

It is a happy number.

143125531 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is an emirp because it is prime and its reverse (135521341) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 143125531 - 2¹¹ = 143123483 is a prime.

It is a super-2 number, since 2×143125531² = 40969835248063922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 143125496 and 143125505.

It is not a weakly prime, because it can be changed into another prime (143125561) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71562765 + 71562766.

It is an arithmetic number, because the mean of its divisors is an integer number (71562766).

Almost surely, 2^143125531 is an apocalyptic number.

143125531 is a deficient number, since it is larger than the sum of its proper divisors (1).

143125531 is an equidigital number, since it uses as much as digits as its factorization.

143125531 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1800, while the sum is 25.

The square root of 143125531 is about 11963.5083065128. The cubic root of 143125531 is about 523.0851251969.

Adding to 143125531 its reverse (135521341), we get a palindrome (278646872).

It can be divided in two parts, 1431 and 25531, that added together give a palindrome (26962).

The spelling of 143125531 in words is "one hundred forty-three million, one hundred twenty-five thousand, five hundred thirty-one".