242220031 has 2 divisors, whose sum is σ = 242220032. Its totient is φ = 242220030.

The previous prime is 242219993. The next prime is 242220067. The reversal of 242220031 is 130022242.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 242220031 - 2¹³ = 242211839 is a prime.

It is a super-2 number, since 2×242220031² = 117341086835281922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 242219987 and 242220014.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (242220431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121110015 + 121110016.

It is an arithmetic number, because the mean of its divisors is an integer number (121110016).

Almost surely, 2^242220031 is an apocalyptic number.

242220031 is a deficient number, since it is larger than the sum of its proper divisors (1).

242220031 is an equidigital number, since it uses as much as digits as its factorization.

242220031 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 192, while the sum is 16.

The square root of 242220031 is about 15563.4196435102. The cubic root of 242220031 is about 623.3567766133.

Adding to 242220031 its reverse (130022242), we get a palindrome (372242273).

The spelling of 242220031 in words is "two hundred forty-two million, two hundred twenty thousand, thirty-one".