30143155 has 16 divisors (see below), whose sum is σ = 41436864. Its totient is φ = 20620800.

The previous prime is 30143153. The next prime is 30143173. The reversal of 30143155 is 55134103.

It is a happy number.

It is not a de Polignac number, because 30143155 - 2¹ = 30143153 is a prime.

It is not an unprimeable number, because it can be changed into a prime (30143153) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20319 + ... + 21751.

It is an arithmetic number, because the mean of its divisors is an integer number (2589804).

Almost surely, 2^30143155 is an apocalyptic number.

30143155 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

30143155 is a deficient number, since it is larger than the sum of its proper divisors (11293709).

30143155 is a wasteful number, since it uses less digits than its factorization.

30143155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2046.

The product of its (nonzero) digits is 900, while the sum is 22.

The square root of 30143155 is about 5490.2782261011. The cubic root of 30143155 is about 311.2167063843.

Adding to 30143155 its reverse (55134103), we get a palindrome (85277258).

The spelling of 30143155 in words is "thirty million, one hundred forty-three thousand, one hundred fifty-five".