312155240 has 16 divisors (see below), whose sum is σ = 702349380. Its totient is φ = 124862080.

The previous prime is 312155197. The next prime is 312155243. The reversal of 312155240 is 42551213.

It can be written as a sum of positive squares in 2 ways, for example, as 307020484 + 5134756 = 17522^2 + 2266^2 .

It is not an unprimeable number, because it can be changed into a prime (312155243) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3901901 + ... + 3901980.

Almost surely, 2^312155240 is an apocalyptic number.

It is an amenable number.

312155240 is an abundant number, since it is smaller than the sum of its proper divisors (390194140).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

312155240 is a wasteful number, since it uses less digits than its factorization.

312155240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7803892 (or 7803888 counting only the distinct ones).

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

The square root of 312155240 is about 17667.9155533413. The cubic root of 312155240 is about 678.3547596229.

The spelling of 312155240 in words is "three hundred twelve million, one hundred fifty-five thousand, two hundred forty".