143520431 has 2 divisors, whose sum is σ = 143520432. Its totient is φ = 143520430.

The previous prime is 143520407. The next prime is 143520457. The reversal of 143520431 is 134025341.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 143520431 - 2⁶ = 143520367 is a prime.

It is a super-2 number, since 2×143520431² = 41196228228851522, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 143520397 and 143520406.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (143520401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71760215 + 71760216.

It is an arithmetic number, because the mean of its divisors is an integer number (71760216).

Almost surely, 2^143520431 is an apocalyptic number.

143520431 is a deficient number, since it is larger than the sum of its proper divisors (1).

143520431 is an equidigital number, since it uses as much as digits as its factorization.

143520431 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1440, while the sum is 23.

The square root of 143520431 is about 11980.0012938230. The cubic root of 143520431 is about 523.5657676674.

Adding to 143520431 its reverse (134025341), we get a palindrome (277545772).

The spelling of 143520431 in words is "one hundred forty-three million, five hundred twenty thousand, four hundred thirty-one".