221525747547140 has 96 divisors (see below), whose sum is σ = 490297982259456. Its totient is φ = 83907980710400.

The previous prime is 221525747547113. The next prime is 221525747547149. The reversal of 221525747547140 is 41745747525122.

It is not an unprimeable number, because it can be changed into a prime (221525747547149) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 375706199 + ... + 376295361.

It is an arithmetic number, because the mean of its divisors is an integer number (5107270648536).

Almost surely, 2^{221525747547140} is an apocalyptic number.

221525747547140 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 221525747547140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (245148991129728).

221525747547140 is an abundant number, since it is smaller than the sum of its proper divisors (268772234712316).

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

221525747547140 is a wasteful number, since it uses less digits than its factorization.

221525747547140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 597389 (or 597387 counting only the distinct ones).

The product of its (nonzero) digits is 21952000, while the sum is 56.

The spelling of 221525747547140 in words is "two hundred twenty-one trillion, five hundred twenty-five billion, seven hundred forty-seven million, five hundred forty-seven thousand, one hundred forty".