212505842322278 has 96 divisors (see below), whose sum is σ = 347322307014144. Its totient is φ = 97447659585984.

The previous prime is 212505842322199. The next prime is 212505842322317. The reversal of 212505842322278 is 872223248505212.

It is a super-2 number, since 2×212505842322278² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2370957701 + ... + 2371047327.

It is an arithmetic number, because the mean of its divisors is an integer number (3617940698064).

Almost surely, 2^{212505842322278} is an apocalyptic number.

212505842322278 is a deficient number, since it is larger than the sum of its proper divisors (134816464691866).

212505842322278 is a wasteful number, since it uses less digits than its factorization.

212505842322278 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90474 (or 90455 counting only the distinct ones).

The product of its (nonzero) digits is 8601600, while the sum is 53.

The spelling of 212505842322278 in words is "two hundred twelve trillion, five hundred five billion, eight hundred forty-two million, three hundred twenty-two thousand, two hundred seventy-eight".