143931814 has 16 divisors (see below), whose sum is σ = 240523920. Its totient is φ = 64139040.

The previous prime is 143931811. The next prime is 143931817. The reversal of 143931814 is 418139341.

It is an interprime number because it is at equal distance from previous prime (143931811) and next prime (143931817).

It is a self number, because there is not a number n which added to its sum of digits gives 143931814.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (143931811) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 94692 + ... + 96199.

It is an arithmetic number, because the mean of its divisors is an integer number (15032745).

Almost surely, 2^143931814 is an apocalyptic number.

143931814 is a deficient number, since it is larger than the sum of its proper divisors (96592106).

143931814 is a wasteful number, since it uses less digits than its factorization.

143931814 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 190935.

The product of its digits is 10368, while the sum is 34.

The square root of 143931814 is about 11997.1585802639. The cubic root of 143931814 is about 524.0655352837.

The spelling of 143931814 in words is "one hundred forty-three million, nine hundred thirty-one thousand, eight hundred fourteen".