249424143 has 4 divisors (see below), whose sum is σ = 332565528. Its totient is φ = 166282760.

The previous prime is 249424139. The next prime is 249424243. The reversal of 249424143 is 341424942.

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 249424143 - 2² = 249424139 is a prime.

It is a super-2 number, since 2×249424143² = 124424806222568898, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (249424243) 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, 41570688 + ... + 41570693.

It is an arithmetic number, because the mean of its divisors is an integer number (83141382).

Almost surely, 2^249424143 is an apocalyptic number.

249424143 is a deficient number, since it is larger than the sum of its proper divisors (83141385).

249424143 is an equidigital number, since it uses as much as digits as its factorization.

249424143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83141384.

The product of its digits is 27648, while the sum is 33.

The square root of 249424143 is about 15793.1676050120. The cubic root of 249424143 is about 629.4764635194.

The spelling of 249424143 in words is "two hundred forty-nine million, four hundred twenty-four thousand, one hundred forty-three".