212525423550 has 72 divisors (see below), whose sum is σ = 622892710440. Its totient is φ = 51521313600.

The previous prime is 212525423507. The next prime is 212525423563. The reversal of 212525423550 is 55324525212.

212525423550 is a `hidden beast` number, since 2 + 1 + 2 + 52 + 54 + 2 + 3 + 550 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 21462265 + ... + 21472164.

It is an arithmetic number, because the mean of its divisors is an integer number (8651287645).

Almost surely, 2^212525423550 is an apocalyptic number.

212525423550 is an abundant number, since it is smaller than the sum of its proper divisors (410367286890).

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

212525423550 is a wasteful number, since it uses less digits than its factorization.

212525423550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42934458 (or 42934450 counting only the distinct ones).

The product of its (nonzero) digits is 120000, while the sum is 36.

Adding to 212525423550 its reverse (55324525212), we get a palindrome (267849948762).

The spelling of 212525423550 in words is "two hundred twelve billion, five hundred twenty-five million, four hundred twenty-three thousand, five hundred fifty".