221048357 has 2 divisors, whose sum is σ = 221048358. Its totient is φ = 221048356.

The previous prime is 221048327. The next prime is 221048389. The reversal of 221048357 is 753840122.

It is an a-pointer prime, because the next prime (221048389) can be obtained adding 221048357 to its sum of digits (32).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 117700801 + 103347556 = 10849^2 + 10166^2 .

It is a cyclic number.

It is not a de Polignac number, because 221048357 - 2⁶ = 221048293 is a prime.

It is a super-2 number, since 2×221048357² = 97724752264798898, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (221048327) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110524178 + 110524179.

It is an arithmetic number, because the mean of its divisors is an integer number (110524179).

Almost surely, 2^221048357 is an apocalyptic number.

It is an amenable number.

221048357 is a deficient number, since it is larger than the sum of its proper divisors (1).

221048357 is an equidigital number, since it uses as much as digits as its factorization.

221048357 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 13440, while the sum is 32.

The square root of 221048357 is about 14867.6950802739. The cubic root of 221048357 is about 604.6384534735.

Adding to 221048357 its reverse (753840122), we get a palindrome (974888479).

The spelling of 221048357 in words is "two hundred twenty-one million, forty-eight thousand, three hundred fifty-seven".