221350501130525 has 24 divisors (see below), whose sum is σ = 295588860284424. Its totient is φ = 163458385632000.

The previous prime is 221350501130461. The next prime is 221350501130573. The reversal of 221350501130525 is 525031105053122.

It is a happy number.

It can be written as a sum of positive squares in 12 ways, for example, as 151521648404569 + 69828852725956 = 12309413^2 + 8356366^2 .

It is not a de Polignac number, because 221350501130525 - 2⁶ = 221350501130461 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 162569867 + ... + 163925783.

It is an arithmetic number, because the mean of its divisors is an integer number (12316202511851).

Almost surely, 2^{221350501130525} is an apocalyptic number.

221350501130525 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

221350501130525 is a deficient number, since it is larger than the sum of its proper divisors (74238359153899).

221350501130525 is a wasteful number, since it uses less digits than its factorization.

221350501130525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1858241 (or 1858236 counting only the distinct ones).

The product of its (nonzero) digits is 45000, while the sum is 35.

Adding to 221350501130525 its reverse (525031105053122), we get a palindrome (746381606183647).

The spelling of 221350501130525 in words is "two hundred twenty-one trillion, three hundred fifty billion, five hundred one million, one hundred thirty thousand, five hundred twenty-five".