242563531 has 16 divisors (see below), whose sum is σ = 295488000. Its totient is φ = 194371200.

The previous prime is 242563493. The next prime is 242563547. The reversal of 242563531 is 135365242.

It is a happy number.

It is not a de Polignac number, because 242563531 - 2⁷ = 242563403 is a prime.

It is a super-2 number, since 2×242563531² = 117674133142375922, 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 = 242563493 and 242563502.

It is not an unprimeable number, because it can be changed into a prime (242563031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11220 + ... + 24718.

It is an arithmetic number, because the mean of its divisors is an integer number (18468000).

Almost surely, 2^242563531 is an apocalyptic number.

242563531 is a deficient number, since it is larger than the sum of its proper divisors (52924469).

242563531 is a wasteful number, since it uses less digits than its factorization.

242563531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13674.

The product of its digits is 21600, while the sum is 31.

The square root of 242563531 is about 15574.4512262872. The cubic root of 242563531 is about 623.6513048477.

It can be divided in two parts, 2425 and 63531, that added together give a palindrome (65956).

The spelling of 242563531 in words is "two hundred forty-two million, five hundred sixty-three thousand, five hundred thirty-one".