30142855 has 4 divisors (see below), whose sum is σ = 36171432. Its totient is φ = 24114280.

The previous prime is 30142843. The next prime is 30142859. The reversal of 30142855 is 55824103.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 55824103 = 271 ⋅205993.

It is not a de Polignac number, because 30142855 - 2⁵ = 30142823 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 (30142859) 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, 3014281 + ... + 3014290.

It is an arithmetic number, because the mean of its divisors is an integer number (9042858).

Almost surely, 2^30142855 is an apocalyptic number.

30142855 is a deficient number, since it is larger than the sum of its proper divisors (6028577).

30142855 is an equidigital number, since it uses as much as digits as its factorization.

30142855 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6028576.

The product of its (nonzero) digits is 4800, while the sum is 28.

The square root of 30142855 is about 5490.2509050134. The cubic root of 30142855 is about 311.2156739186.

Adding to 30142855 its reverse (55824103), we get a palindrome (85966958).

The spelling of 30142855 in words is "thirty million, one hundred forty-two thousand, eight hundred fifty-five".