212403100 has 144 divisors (see below), whose sum is σ = 601086528. Its totient is φ = 63221760.

The previous prime is 212403067. The next prime is 212403119. The reversal of 212403100 is 1304212.

It is a super-2 number, since 2×212403100² = 90230153779220000, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (13).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 154014 + ... + 155386.

It is an arithmetic number, because the mean of its divisors is an integer number (4174212).

Almost surely, 2^212403100 is an apocalyptic number.

212403100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 212403100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (300543264).

212403100 is an abundant number, since it is smaller than the sum of its proper divisors (388683428).

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

212403100 is a wasteful number, since it uses less digits than its factorization.

212403100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1424 (or 1417 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 13.

The square root of 212403100 is about 14574.0557155515. The cubic root of 212403100 is about 596.6508774505.

Adding to 212403100 its reverse (1304212), we get a palindrome (213707312).

The spelling of 212403100 in words is "two hundred twelve million, four hundred three thousand, one hundred".