242220497 has 8 divisors (see below), whose sum is σ = 251530440. Its totient is φ = 233072640.

The previous prime is 242220491. The next prime is 242220571. The reversal of 242220497 is 794022242.

It can be written as a sum of positive squares in 4 ways, for example, as 15085456 + 227135041 = 3884^2 + 15071^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 242220497 - 2²⁶ = 175111633 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (242220491) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 37472 + ... + 43457.

It is an arithmetic number, because the mean of its divisors is an integer number (31441305).

Almost surely, 2^242220497 is an apocalyptic number.

It is an amenable number.

242220497 is a deficient number, since it is larger than the sum of its proper divisors (9309943).

242220497 is an equidigital number, since it uses as much as digits as its factorization.

242220497 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81043.

The product of its (nonzero) digits is 16128, while the sum is 32.

The square root of 242220497 is about 15563.4346145059. The cubic root of 242220497 is about 623.3571763656.

The spelling of 242220497 in words is "two hundred forty-two million, two hundred twenty thousand, four hundred ninety-seven".