212508623840 has 96 divisors (see below), whose sum is σ = 515840197824. Its totient is φ = 82670837760.

The previous prime is 212508623837. The next prime is 212508623843. The reversal of 212508623840 is 48326805212.

It is an interprime number because it is at equal distance from previous prime (212508623837) and next prime (212508623843).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212508623843) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17144045 + ... + 17156435.

It is an arithmetic number, because the mean of its divisors is an integer number (5373335394).

Almost surely, 2^212508623840 is an apocalyptic number.

212508623840 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 212508623840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (257920098912).

212508623840 is an abundant number, since it is smaller than the sum of its proper divisors (303331573984).

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

212508623840 is a wasteful number, since it uses less digits than its factorization.

212508623840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15340 (or 15332 counting only the distinct ones).

The product of its (nonzero) digits is 184320, while the sum is 41.

The spelling of 212508623840 in words is "two hundred twelve billion, five hundred eight million, six hundred twenty-three thousand, eight hundred forty".