212504136 has 128 divisors (see below), whose sum is σ = 594397440. Its totient is φ = 62899200.

The previous prime is 212504081. The next prime is 212504177. The reversal of 212504136 is 631405212.

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

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1173966 + ... + 1174146.

It is an arithmetic number, because the mean of its divisors is an integer number (4643730).

Almost surely, 2^212504136 is an apocalyptic number.

212504136 is a gapful number since it is divisible by the number (26) 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 212504136, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (297198720).

212504136 is an abundant number, since it is smaller than the sum of its proper divisors (381893304).

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

212504136 is a wasteful number, since it uses less digits than its factorization.

212504136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 327 (or 323 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 24.

The square root of 212504136 is about 14577.5216000526. The cubic root of 212504136 is about 596.7454675044.

Adding to 212504136 its reverse (631405212), we get a palindrome (843909348).

The spelling of 212504136 in words is "two hundred twelve million, five hundred four thousand, one hundred thirty-six".