312220055 has 32 divisors (see below), whose sum is σ = 449280000. Its totient is φ = 203651712.

The previous prime is 312220039. The next prime is 312220057. The reversal of 312220055 is 550022213.

It is a cyclic number.

It is not a de Polignac number, because 312220055 - 2⁴ = 312220039 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (312220057) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 159221 + ... + 161169.

It is an arithmetic number, because the mean of its divisors is an integer number (14040000).

Almost surely, 2^312220055 is an apocalyptic number.

312220055 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

312220055 is a deficient number, since it is larger than the sum of its proper divisors (137059945).

312220055 is a wasteful number, since it uses less digits than its factorization.

312220055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2183.

The product of its (nonzero) digits is 600, while the sum is 20.

The square root of 312220055 is about 17669.7497152620. The cubic root of 312220055 is about 678.4017069057.

Adding to 312220055 its reverse (550022213), we get a palindrome (862242268).

The spelling of 312220055 in words is "three hundred twelve million, two hundred twenty thousand, fifty-five".