242221039 has 4 divisors (see below), whose sum is σ = 243307456. Its totient is φ = 241134624.

The previous prime is 242220991. The next prime is 242221051. The reversal of 242221039 is 930122242.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-242221039 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (242221099) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 542874 + ... + 543319.

It is an arithmetic number, because the mean of its divisors is an integer number (60826864).

Almost surely, 2^242221039 is an apocalyptic number.

242221039 is a deficient number, since it is larger than the sum of its proper divisors (1086417).

242221039 is a wasteful number, since it uses less digits than its factorization.

242221039 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1086416.

The product of its (nonzero) digits is 1728, while the sum is 25.

The square root of 242221039 is about 15563.4520271050. The cubic root of 242221039 is about 623.3576413130.

The spelling of 242221039 in words is "two hundred forty-two million, two hundred twenty-one thousand, thirty-nine".