1831106813 has 4 divisors (see below), whose sum is σ = 1841336640. Its totient is φ = 1820876988.

The previous prime is 1831106807. The next prime is 1831106819. The reversal of 1831106813 is 3186011381.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 3186011381 = 7 ⋅455144483.

It is an interprime number because it is at equal distance from previous prime (1831106807) and next prime (1831106819).

It is a cyclic number.

It is not a de Polignac number, because 1831106813 - 2¹⁰ = 1831105789 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1831106813.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1831106819) 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, 5114645 + ... + 5115002.

It is an arithmetic number, because the mean of its divisors is an integer number (460334160).

Almost surely, 2^1831106813 is an apocalyptic number.

It is an amenable number.

1831106813 is a deficient number, since it is larger than the sum of its proper divisors (10229827).

1831106813 is a wasteful number, since it uses less digits than its factorization.

1831106813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10229826.

The product of its (nonzero) digits is 3456, while the sum is 32.

The square root of 1831106813 is about 42791.4338740828. The cubic root of 1831106813 is about 1223.4077467540.

The spelling of 1831106813 in words is "one billion, eight hundred thirty-one million, one hundred six thousand, eight hundred thirteen".