242479881 has 72 divisors (see below), whose sum is σ = 439501920. Its totient is φ = 128024064.

The previous prime is 242479873. The next prime is 242479883. The reversal of 242479881 is 188974242.

It is not a de Polignac number, because 242479881 - 2³ = 242479873 is a prime.

It is a super-2 number, since 2×242479881² = 117592985379548322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (242479883) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 359961 + ... + 360633.

Almost surely, 2^242479881 is an apocalyptic number.

242479881 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

242479881 is a deficient number, since it is larger than the sum of its proper divisors (197022039).

242479881 is a wasteful number, since it uses less digits than its factorization.

242479881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 755 (or 745 counting only the distinct ones).

The product of its digits is 258048, while the sum is 45.

The square root of 242479881 is about 15571.7655068396. The cubic root of 242479881 is about 623.5796062024.

The spelling of 242479881 in words is "two hundred forty-two million, four hundred seventy-nine thousand, eight hundred eighty-one".