312888881972 has 6 divisors (see below), whose sum is σ = 547555543458. Its totient is φ = 156444440984.

The previous prime is 312888881927. The next prime is 312888882017. The reversal of 312888881972 is 279188888213.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (312888881927) and next prime (312888882017).

It can be written as a sum of positive squares in only one way, i.e., 213218603536 + 99670278436 = 461756^2 + 315706^2 .

It is a junction number, because it is equal to n+sod(n) for n = 312888881899 and 312888881908.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39111110243 + ... + 39111110250.

It is an arithmetic number, because the mean of its divisors is an integer number (91259257243).

Almost surely, 2^312888881972 is an apocalyptic number.

It is an amenable number.

312888881972 is a deficient number, since it is larger than the sum of its proper divisors (234666661486).

312888881972 is a wasteful number, since it uses less digits than its factorization.

312888881972 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78222220497 (or 78222220495 counting only the distinct ones).

The product of its digits is 24772608, while the sum is 65.

The spelling of 312888881972 in words is "three hundred twelve billion, eight hundred eighty-eight million, eight hundred eighty-one thousand, nine hundred seventy-two".