30122143 has 4 divisors (see below), whose sum is σ = 30144328. Its totient is φ = 30099960.

The previous prime is 30122137. The next prime is 30122153. The reversal of 30122143 is 34122103.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-30122143 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 (30122123) 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, 8913 + ... + 11818.

It is an arithmetic number, because the mean of its divisors is an integer number (7536082).

Almost surely, 2^30122143 is an apocalyptic number.

30122143 is a deficient number, since it is larger than the sum of its proper divisors (22185).

30122143 is a wasteful number, since it uses less digits than its factorization.

30122143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22184.

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 30122143 is about 5488.3643282858. The cubic root of 30122143 is about 311.1443759168.

Adding to 30122143 its reverse (34122103), we get a palindrome (64244246).

The spelling of 30122143 in words is "thirty million, one hundred twenty-two thousand, one hundred forty-three".