212515380 has 384 divisors, whose sum is σ = 870912000. Its totient is φ = 41679360.

The previous prime is 212515367. The next prime is 212515409. The reversal of 212515380 is 83515212.

It is a happy number.

212515380 is a `hidden beast` number, since 2 + 125 + 1 + 538 + 0 = 666.

212515380 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 789886 + ... + 790154.

It is an arithmetic number, because the mean of its divisors is an integer number (2268000).

Almost surely, 2^212515380 is an apocalyptic number.

212515380 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 212515380, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (435456000).

212515380 is an abundant number, since it is smaller than the sum of its proper divisors (658396620).

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

212515380 is a wasteful number, since it uses less digits than its factorization.

212515380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 324 (or 316 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 27.

The square root of 212515380 is about 14577.9072572163. The cubic root of 212515380 is about 596.7559922999.

The spelling of 212515380 in words is "two hundred twelve million, five hundred fifteen thousand, three hundred eighty".