211672900 has 18 divisors (see below), whose sum is σ = 459330410. Its totient is φ = 84669120.

The previous prime is 211672889. The next prime is 211672907. The reversal of 211672900 is 9276112.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 2985984 + 208686916 = 1728^2 + 14446^2 .

It is not an unprimeable number, because it can be changed into a prime (211672907) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1058265 + ... + 1058464.

Almost surely, 2^211672900 is an apocalyptic number.

211672900 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

211672900 is an abundant number, since it is smaller than the sum of its proper divisors (247657510).

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

211672900 is a wasteful number, since it uses less digits than its factorization.

211672900 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2116743 (or 2116736 counting only the distinct ones).

The product of its (nonzero) digits is 1512, while the sum is 28.

The square root of 211672900 is about 14548.9827823116. The cubic root of 211672900 is about 595.9663697373.

It can be divided in two parts, 2116 and 72900, that multiplied together give a square (154256400 = 12420²).

The spelling of 211672900 in words is "two hundred eleven million, six hundred seventy-two thousand, nine hundred".