211225525420 has 72 divisors (see below), whose sum is σ = 548936456544. Its totient is φ = 66849389568.

The previous prime is 211225525369. The next prime is 211225525429. The reversal of 211225525420 is 24525522112.

It is not an unprimeable number, because it can be changed into a prime (211225525429) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4440109 + ... + 4487428.

It is an arithmetic number, because the mean of its divisors is an integer number (7624117452).

Almost surely, 2^211225525420 is an apocalyptic number.

211225525420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

211225525420 is an abundant number, since it is smaller than the sum of its proper divisors (337710931124).

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

211225525420 is a wasteful number, since it uses less digits than its factorization.

211225525420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8927579 (or 8927564 counting only the distinct ones).

The product of its (nonzero) digits is 16000, while the sum is 31.

The spelling of 211225525420 in words is "two hundred eleven billion, two hundred twenty-five million, five hundred twenty-five thousand, four hundred twenty".