1613231143 has 4 divisors (see below), whose sum is σ = 1613312568. Its totient is φ = 1613149720.

The previous prime is 1613231101. The next prime is 1613231183. The reversal of 1613231143 is 3411323161.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 3411323161 = 157 ⋅21728173.

It is a cyclic number.

It is not a de Polignac number, because 1613231143 - 2⁹ = 1613230631 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1613231183) 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, 10380 + ... + 57742.

It is an arithmetic number, because the mean of its divisors is an integer number (403328142).

Almost surely, 2^1613231143 is an apocalyptic number.

1613231143 is a deficient number, since it is larger than the sum of its proper divisors (81425).

1613231143 is an equidigital number, since it uses as much as digits as its factorization.

1613231143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81424.

The product of its digits is 1296, while the sum is 25.

The square root of 1613231143 is about 40165.0487737784. The cubic root of 1613231143 is about 1172.8222570184.

The spelling of 1613231143 in words is "one billion, six hundred thirteen million, two hundred thirty-one thousand, one hundred forty-three".