212981504 has 54 divisors (see below), whose sum is σ = 434268240. Its totient is φ = 104247808.

The previous prime is 212981497. The next prime is 212981519. The reversal of 212981504 is 405189212.

It is a super-2 number, since 2×212981504² = 90722242092204032, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 891017 + ... + 891255.

Almost surely, 2^212981504 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 212981504, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (217134120).

212981504 is an abundant number, since it is smaller than the sum of its proper divisors (221286736).

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

212981504 is an frugal number, since it uses more digits than its factorization.

212981504 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 373 (or 300 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 32.

The square root of 212981504 is about 14593.8858430508. The cubic root of 212981504 is about 597.1919751247.

The spelling of 212981504 in words is "two hundred twelve million, nine hundred eighty-one thousand, five hundred four".