143531407 has 2 divisors, whose sum is σ = 143531408. Its totient is φ = 143531406.

The previous prime is 143531393. The next prime is 143531417. The reversal of 143531407 is 704135341.

143531407 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 143531407 - 2¹⁵ = 143498639 is a prime.

It is equal to p_8100478 and since 143531407 and 8100478 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (143531417) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71765703 + 71765704.

It is an arithmetic number, because the mean of its divisors is an integer number (71765704).

Almost surely, 2^143531407 is an apocalyptic number.

143531407 is a deficient number, since it is larger than the sum of its proper divisors (1).

143531407 is an equidigital number, since it uses as much as digits as its factorization.

143531407 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5040, while the sum is 28.

The square root of 143531407 is about 11980.4593818434. The cubic root of 143531407 is about 523.5791142257.

Adding to 143531407 its reverse (704135341), we get a palindrome (847666748).

The spelling of 143531407 in words is "one hundred forty-three million, five hundred thirty-one thousand, four hundred seven".