312252052221 has 16 divisors (see below), whose sum is σ = 462625321920. Its totient is φ = 208154674800.

The previous prime is 312252052207. The next prime is 312252052247. The reversal of 312252052221 is 122250252213.

It is not a de Polignac number, because 312252052221 - 2⁶ = 312252052157 is a prime.

It is a super-2 number, since 2×312252052221² (a number of 24 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (312252052201) 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, 66771 + ... + 793071.

It is an arithmetic number, because the mean of its divisors is an integer number (28914082620).

Almost surely, 2^312252052221 is an apocalyptic number.

It is an amenable number.

312252052221 is a deficient number, since it is larger than the sum of its proper divisors (150373269699).

312252052221 is a wasteful number, since it uses less digits than its factorization.

312252052221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 742233 (or 742227 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 27.

The spelling of 312252052221 in words is "three hundred twelve billion, two hundred fifty-two million, fifty-two thousand, two hundred twenty-one".