30712143 has 16 divisors (see below), whose sum is σ = 51054336. Its totient is φ = 15954240.

The previous prime is 30712139. The next prime is 30712147. The reversal of 30712143 is 34121703.

It is an interprime number because it is at equal distance from previous prime (30712139) and next prime (30712147).

It is not a de Polignac number, because 30712143 - 2² = 30712139 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30712147) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 66246 + ... + 66707.

It is an arithmetic number, because the mean of its divisors is an integer number (3190896).

Almost surely, 2^30712143 is an apocalyptic number.

30712143 is a gapful number since it is divisible by the number (33) formed by its first and last digit.

30712143 is a deficient number, since it is larger than the sum of its proper divisors (20342193).

30712143 is a wasteful number, since it uses less digits than its factorization.

30712143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 132974.

The product of its (nonzero) digits is 504, while the sum is 21.

The square root of 30712143 is about 5541.8537512280. The cubic root of 30712143 is about 313.1627083961.

Adding to 30712143 its reverse (34121703), we get a palindrome (64833846).

The spelling of 30712143 in words is "thirty million, seven hundred twelve thousand, one hundred forty-three".