221142503 has 2 divisors, whose sum is σ = 221142504. Its totient is φ = 221142502.

The previous prime is 221142491. The next prime is 221142521. The reversal of 221142503 is 305241122.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 221142503 - 2²⁶ = 154033639 is a prime.

It is a super-3 number, since 3×221142503³ (a number of 26 digits) contains 333 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (221142533) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110571251 + 110571252.

It is an arithmetic number, because the mean of its divisors is an integer number (110571252).

Almost surely, 2^221142503 is an apocalyptic number.

221142503 is a deficient number, since it is larger than the sum of its proper divisors (1).

221142503 is an equidigital number, since it uses as much as digits as its factorization.

221142503 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 221142503 is about 14870.8608694991. The cubic root of 221142503 is about 604.7242811676.

Adding to 221142503 its reverse (305241122), we get a palindrome (526383625).

The spelling of 221142503 in words is "two hundred twenty-one million, one hundred forty-two thousand, five hundred three".