212131000 has 32 divisors (see below), whose sum is σ = 496388880. Its totient is φ = 84852000.

The previous prime is 212130983. The next prime is 212131009. The reversal of 212131000 is 131212.

212131000 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×212131000² = 89999122322000000, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212131009) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 105066 + ... + 107065.

Almost surely, 2^212131000 is an apocalyptic number.

212131000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

212131000 is an abundant number, since it is smaller than the sum of its proper divisors (284257880).

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

212131000 is a wasteful number, since it uses less digits than its factorization.

212131000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 212152 (or 212138 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 10.

The square root of 212131000 is about 14564.7176423026. The cubic root of 212131000 is about 596.3959877635.

Adding to 212131000 its reverse (131212), we get a palindrome (212262212).

The spelling of 212131000 in words is "two hundred twelve million, one hundred thirty-one thousand".