312195242820 has 48 divisors (see below), whose sum is σ = 874179391680. Its totient is φ = 83248949376.

The previous prime is 312195242809. The next prime is 312195242831. The reversal of 312195242820 is 28242591213.

It is an interprime number because it is at equal distance from previous prime (312195242809) and next prime (312195242831).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1837011 + ... + 1999749.

It is an arithmetic number, because the mean of its divisors is an integer number (18212070660).

Almost surely, 2^312195242820 is an apocalyptic number.

312195242820 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

312195242820 is an abundant number, since it is smaller than the sum of its proper divisors (561984148860).

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

312195242820 is a wasteful number, since it uses less digits than its factorization.

312195242820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 194724 (or 194722 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 39.

The spelling of 312195242820 in words is "three hundred twelve billion, one hundred ninety-five million, two hundred forty-two thousand, eight hundred twenty".