211225205400 has 96 divisors (see below), whose sum is σ = 714325262400. Its totient is φ = 51206108800.

The previous prime is 211225205381. The next prime is 211225205447. The reversal of 211225205400 is 4502522112.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 15995310 + ... + 16008509.

It is an arithmetic number, because the mean of its divisors is an integer number (7440888150).

Almost surely, 2^211225205400 is an apocalyptic number.

211225205400 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

211225205400 is an abundant number, since it is smaller than the sum of its proper divisors (503100057000).

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

211225205400 is a wasteful number, since it uses less digits than its factorization.

211225205400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32003849 (or 32003840 counting only the distinct ones).

The product of its (nonzero) digits is 1600, while the sum is 24.

Adding to 211225205400 its reverse (4502522112), we get a palindrome (215727727512).

The spelling of 211225205400 in words is "two hundred eleven billion, two hundred twenty-five million, two hundred five thousand, four hundred".