221051325 has 24 divisors (see below), whose sum is σ = 398697696. Its totient is φ = 107176000.

The previous prime is 221051279. The next prime is 221051333. The reversal of 221051325 is 523150122.

It is not a de Polignac number, because 221051325 - 2¹⁹ = 220527037 is a prime.

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, 133146 + ... + 134795.

It is an arithmetic number, because the mean of its divisors is an integer number (16612404).

Almost surely, 2^221051325 is an apocalyptic number.

221051325 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

221051325 is a deficient number, since it is larger than the sum of its proper divisors (177646371).

221051325 is a wasteful number, since it uses less digits than its factorization.

221051325 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 267965 (or 267960 counting only the distinct ones).

The product of its (nonzero) digits is 600, while the sum is 21.

The square root of 221051325 is about 14867.7948936619. The cubic root of 221051325 is about 604.6411596067.

It can be divided in two parts, 2210 and 51325, that added together give a palindrome (53535).

The spelling of 221051325 in words is "two hundred twenty-one million, fifty-one thousand, three hundred twenty-five".