211249928400 has 120 divisors (see below), whose sum is σ = 773375959104. Its totient is φ = 48285696000.

The previous prime is 211249928353. The next prime is 211249928429. The reversal of 211249928400 is 4829942112.

It is a tau number, because it is divible by the number of its divisors (120).

It is a Harshad number since it is a multiple of its sum of digits (42).

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, 12566001 + ... + 12582800.

Almost surely, 2^211249928400 is an apocalyptic number.

211249928400 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

211249928400 is an abundant number, since it is smaller than the sum of its proper divisors (562126030704).

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

211249928400 is a wasteful number, since it uses less digits than its factorization.

211249928400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25148829 (or 25148818 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 42.

The spelling of 211249928400 in words is "two hundred eleven billion, two hundred forty-nine million, nine hundred twenty-eight thousand, four hundred".