221372353 has 2 divisors, whose sum is σ = 221372354. Its totient is φ = 221372352.

The previous prime is 221372321. The next prime is 221372377. The reversal of 221372353 is 353273122.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 112211649 + 109160704 = 10593^2 + 10448^2 .

It is a cyclic number.

It is not a de Polignac number, because 221372353 - 2⁵ = 221372321 is a prime.

It is not a weakly prime, because it can be changed into another prime (221372383) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110686176 + 110686177.

It is an arithmetic number, because the mean of its divisors is an integer number (110686177).

Almost surely, 2^221372353 is an apocalyptic number.

It is an amenable number.

221372353 is a deficient number, since it is larger than the sum of its proper divisors (1).

221372353 is an equidigital number, since it uses as much as digits as its factorization.

221372353 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7560, while the sum is 28.

The square root of 221372353 is about 14878.5870632933. The cubic root of 221372353 is about 604.9337203989.

The spelling of 221372353 in words is "two hundred twenty-one million, three hundred seventy-two thousand, three hundred fifty-three".