189221130525 has 144 divisors (see below), whose sum is σ = 389014351488. Its totient is φ = 80720640000.

The previous prime is 189221130521. The next prime is 189221130619. The reversal of 189221130525 is 525031122981.

It is a happy number.

It is not a de Polignac number, because 189221130525 - 2² = 189221130521 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (189221130521) by changing a digit.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 3438225 + ... + 3492825.

It is an arithmetic number, because the mean of its divisors is an integer number (2701488552).

Almost surely, 2^189221130525 is an apocalyptic number.

189221130525 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

189221130525 is an abundant number, since it is smaller than the sum of its proper divisors (199793220963).

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

189221130525 is a wasteful number, since it uses less digits than its factorization.

189221130525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54692 (or 54680 counting only the distinct ones).

The product of its (nonzero) digits is 43200, while the sum is 39.

It can be divided in two parts, 189 and 221130525, that multiplied together give a square (41793669225 = 204435²).

The spelling of 189221130525 in words is "one hundred eighty-nine billion, two hundred twenty-one million, one hundred thirty thousand, five hundred twenty-five".