242252981 has 4 divisors (see below), whose sum is σ = 242772192. Its totient is φ = 241733772.

The previous prime is 242252963. The next prime is 242252987. The reversal of 242252981 is 189252242.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 242252981 - 2²² = 238058677 is a prime.

It is a super-2 number, since 2×242252981² = 117373013606772722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (242252987) 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, 258905 + ... + 259838.

It is an arithmetic number, because the mean of its divisors is an integer number (60693048).

Almost surely, 2^242252981 is an apocalyptic number.

It is an amenable number.

242252981 is a deficient number, since it is larger than the sum of its proper divisors (519211).

242252981 is an equidigital number, since it uses as much as digits as its factorization.

242252981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 519210.

The product of its digits is 23040, while the sum is 35.

The square root of 242252981 is about 15564.4781794958. The cubic root of 242252981 is about 623.3850410999.

The spelling of 242252981 in words is "two hundred forty-two million, two hundred fifty-two thousand, nine hundred eighty-one".