212256408280 has 64 divisors (see below), whose sum is σ = 549728928000. Its totient is φ = 72250061184.

The previous prime is 212256408277. The next prime is 212256408289. The reversal of 212256408280 is 82804652212.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212256408289) 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, 2687910 + ... + 2765749.

It is an arithmetic number, because the mean of its divisors is an integer number (8589514500).

Almost surely, 2^212256408280 is an apocalyptic number.

212256408280 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

212256408280 is an abundant number, since it is smaller than the sum of its proper divisors (337472519720).

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

212256408280 is a wasteful number, since it uses less digits than its factorization.

212256408280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5453816 (or 5453812 counting only the distinct ones).

The product of its (nonzero) digits is 122880, while the sum is 40.

The spelling of 212256408280 in words is "two hundred twelve billion, two hundred fifty-six million, four hundred eight thousand, two hundred eighty".