312203020243240 has 64 divisors (see below), whose sum is σ = 850031752608000. Its totient is φ = 100744504009728.

The previous prime is 312203020243237. The next prime is 312203020243243. The reversal of 312203020243240 is 42342020302213.

It is an interprime number because it is at equal distance from previous prime (312203020243237) and next prime (312203020243243).

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a junction number, because it is equal to n+sod(n) for n = 312203020243199 and 312203020243208.

It is not an unprimeable number, because it can be changed into a prime (312203020243243) 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, 32794430140 + ... + 32794439659.

It is an arithmetic number, because the mean of its divisors is an integer number (13281746134500).

Almost surely, 2^{312203020243240} is an apocalyptic number.

It is an amenable number.

312203020243240 is an abundant number, since it is smaller than the sum of its proper divisors (537828732364760).

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

312203020243240 is a wasteful number, since it uses less digits than its factorization.

312203020243240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65588869834 (or 65588869830 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 28.

Adding to 312203020243240 its reverse (42342020302213), we get a palindrome (354545040545453).

The spelling of 312203020243240 in words is "three hundred twelve trillion, two hundred three billion, twenty million, two hundred forty-three thousand, two hundred forty".