221036051 has 2 divisors, whose sum is σ = 221036052. Its totient is φ = 221036050.

The previous prime is 221036021. The next prime is 221036059. The reversal of 221036051 is 150630122.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 221036051 - 2¹⁰ = 221035027 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (221036059) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110518025 + 110518026.

It is an arithmetic number, because the mean of its divisors is an integer number (110518026).

Almost surely, 2^221036051 is an apocalyptic number.

221036051 is a deficient number, since it is larger than the sum of its proper divisors (1).

221036051 is an equidigital number, since it uses as much as digits as its factorization.

221036051 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 360, while the sum is 20.

The square root of 221036051 is about 14867.2812242185. The cubic root of 221036051 is about 604.6272329741.

Adding to 221036051 its reverse (150630122), we get a palindrome (371666173).

The spelling of 221036051 in words is "two hundred twenty-one million, thirty-six thousand, fifty-one".