312212452140 has 72 divisors (see below), whose sum is σ = 948545646048. Its totient is φ = 83124679680.

The previous prime is 312212452133. The next prime is 312212452141. The reversal of 312212452140 is 41254212213.

312212452140 is a `hidden beast` number, since 3 + 12 + 2 + 124 + 521 + 4 + 0 = 666.

It is not an unprimeable number, because it can be changed into a prime (312212452141) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1260837 + ... + 1487996.

It is an arithmetic number, because the mean of its divisors is an integer number (13174245084).

Almost surely, 2^312212452140 is an apocalyptic number.

312212452140 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

312212452140 is an abundant number, since it is smaller than the sum of its proper divisors (636333193908).

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

312212452140 is a wasteful number, since it uses less digits than its factorization.

312212452140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2749479 (or 2749474 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 27.

Adding to 312212452140 its reverse (41254212213), we get a palindrome (353466664353).

The spelling of 312212452140 in words is "three hundred twelve billion, two hundred twelve million, four hundred fifty-two thousand, one hundred forty".