211974923400 has 48 divisors (see below), whose sum is σ = 657122264400. Its totient is φ = 56526646080.

The previous prime is 211974923399. The next prime is 211974923417. The reversal of 211974923400 is 4329479112.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 176645170 + ... + 176646369.

It is an arithmetic number, because the mean of its divisors is an integer number (13690047175).

Almost surely, 2^211974923400 is an apocalyptic number.

211974923400 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

211974923400 is an abundant number, since it is smaller than the sum of its proper divisors (445147341000).

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

211974923400 is a wasteful number, since it uses less digits than its factorization.

211974923400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 353291558 (or 353291549 counting only the distinct ones).

The product of its (nonzero) digits is 108864, while the sum is 42.

The spelling of 211974923400 in words is "two hundred eleven billion, nine hundred seventy-four million, nine hundred twenty-three thousand, four hundred".