212900855540 has 12 divisors (see below), whose sum is σ = 447091796676. Its totient is φ = 85160342208.

The previous prime is 212900855483. The next prime is 212900855579. The reversal of 212900855540 is 45558009212.

It can be written as a sum of positive squares in 2 ways, for example, as 61145420176 + 151755435364 = 247276^2 + 389558^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5322521369 + ... + 5322521408.

It is an arithmetic number, because the mean of its divisors is an integer number (37257649723).

Almost surely, 2^212900855540 is an apocalyptic number.

212900855540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

212900855540 is an abundant number, since it is smaller than the sum of its proper divisors (234190941136).

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

212900855540 is a wasteful number, since it uses less digits than its factorization.

212900855540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10645042786 (or 10645042784 counting only the distinct ones).

The product of its (nonzero) digits is 144000, while the sum is 41.

The spelling of 212900855540 in words is "two hundred twelve billion, nine hundred million, eight hundred fifty-five thousand, five hundred forty".