312042155 has 16 divisors (see below), whose sum is σ = 378881280. Its totient is φ = 246693888.

The previous prime is 312042151. The next prime is 312042193. The reversal of 312042155 is 551240213.

It is a cyclic number.

It is not a de Polignac number, because 312042155 - 2² = 312042151 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 312042155.

It is not an unprimeable number, because it can be changed into a prime (312042151) 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, 270059 + ... + 271211.

It is an arithmetic number, because the mean of its divisors is an integer number (23680080).

Almost surely, 2^312042155 is an apocalyptic number.

312042155 is a deficient number, since it is larger than the sum of its proper divisors (66839125).

312042155 is a wasteful number, since it uses less digits than its factorization.

312042155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1750.

The product of its (nonzero) digits is 1200, while the sum is 23.

The square root of 312042155 is about 17664.7149708112. The cubic root of 312042155 is about 678.2728334918.

Adding to 312042155 its reverse (551240213), we get a palindrome (863282368).

The spelling of 312042155 in words is "three hundred twelve million, forty-two thousand, one hundred fifty-five".