242445031 has 4 divisors (see below), whose sum is σ = 242476200. Its totient is φ = 242413864.

The previous prime is 242445029. The next prime is 242445037. The reversal of 242445031 is 130544242.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 130544242 = 2 ⋅65272121.

It is a cyclic number.

It is not a de Polignac number, because 242445031 - 2¹ = 242445029 is a prime.

It is a super-2 number, since 2×242445031² = 117559186113181922, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 242444987 and 242445005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (242445037) 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, 6825 + ... + 23053.

It is an arithmetic number, because the mean of its divisors is an integer number (60619050).

Almost surely, 2^242445031 is an apocalyptic number.

242445031 is a deficient number, since it is larger than the sum of its proper divisors (31169).

242445031 is a wasteful number, since it uses less digits than its factorization.

242445031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31168.

The product of its (nonzero) digits is 3840, while the sum is 25.

The square root of 242445031 is about 15570.6464541457. The cubic root of 242445031 is about 623.5497304722.

Adding to 242445031 its reverse (130544242), we get a palindrome (372989273).

The spelling of 242445031 in words is "two hundred forty-two million, four hundred forty-five thousand, thirty-one".