30131869 has 4 divisors (see below), whose sum is σ = 30170944. Its totient is φ = 30092796.

The previous prime is 30131867. The next prime is 30131873. The reversal of 30131869 is 96813103.

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.

It is a cyclic number.

It is not a de Polignac number, because 30131869 - 2¹ = 30131867 is a prime.

It is a super-2 number, since 2×30131869² = 1815859058866322, which contains 22 as substring.

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 30131869.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30131861) 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, 18357 + ... + 19930.

It is an arithmetic number, because the mean of its divisors is an integer number (7542736).

Almost surely, 2^30131869 is an apocalyptic number.

It is an amenable number.

30131869 is a deficient number, since it is larger than the sum of its proper divisors (39075).

30131869 is an equidigital number, since it uses as much as digits as its factorization.

30131869 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39074.

The product of its (nonzero) digits is 3888, while the sum is 31.

The square root of 30131869 is about 5489.2503131120. The cubic root of 30131869 is about 311.1778603047.

The spelling of 30131869 in words is "thirty million, one hundred thirty-one thousand, eight hundred sixty-nine".