212156171228304 has 30 divisors (see below), whose sum is σ = 593742618090726. Its totient is φ = 70718723742720.

The previous prime is 212156171228293. The next prime is 212156171228359. The reversal of 212156171228304 is 403822171651212.

It is a happy number.

212156171228304 is a `hidden beast` number, since 2 + 1 + 2 + 1 + 5 + 617 + 1 + 2 + 28 + 3 + 0 + 4 = 666.

It can be written as a sum of positive squares in only one way, i.e., 107513091797904 + 104643079430400 = 10368852^2 + 10229520^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 212156171228304.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 736653372177 + ... + 736653372464.

Almost surely, 2^{212156171228304} is an apocalyptic number.

212156171228304 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

212156171228304 is an abundant number, since it is smaller than the sum of its proper divisors (381586446862422).

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

212156171228304 is a wasteful number, since it uses less digits than its factorization.

212156171228304 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1473306744655 (or 1473306744646 counting only the distinct ones).

The product of its (nonzero) digits is 322560, while the sum is 45.

The spelling of 212156171228304 in words is "two hundred twelve trillion, one hundred fifty-six billion, one hundred seventy-one million, two hundred twenty-eight thousand, three hundred four".