242099971 has 2 divisors, whose sum is σ = 242099972. Its totient is φ = 242099970.

The previous prime is 242099969. The next prime is 242099983. The reversal of 242099971 is 179990242.

242099971 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 242099971 - 2¹ = 242099969 is a prime.

It is a super-2 number, since 2×242099971² = 117224791916401682, which contains 22 as substring.

Together with 242099969, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (242090971) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121049985 + 121049986.

It is an arithmetic number, because the mean of its divisors is an integer number (121049986).

Almost surely, 2^242099971 is an apocalyptic number.

242099971 is a deficient number, since it is larger than the sum of its proper divisors (1).

242099971 is an equidigital number, since it uses as much as digits as its factorization.

242099971 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 81648, while the sum is 43.

The square root of 242099971 is about 15559.5620439651. The cubic root of 242099971 is about 623.2537675394.

The spelling of 242099971 in words is "two hundred forty-two million, ninety-nine thousand, nine hundred seventy-one".