242151231 has 8 divisors (see below), whose sum is σ = 368992384. Its totient is φ = 138372120.

The previous prime is 242151209. The next prime is 242151233. The reversal of 242151231 is 132151242.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 242151231 - 2¹¹ = 242149183 is a prime.

It is a super-2 number, since 2×242151231² = 117274437349630722, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21), and also a Moran number because the ratio is a prime number: 11531011 = 242151231 / (2 + 4 + 2 + 1 + 5 + 1 + 2 + 3 + 1).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 242151198 and 242151207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (242151233) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5765485 + ... + 5765526.

It is an arithmetic number, because the mean of its divisors is an integer number (46124048).

Almost surely, 2^242151231 is an apocalyptic number.

242151231 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

242151231 is a deficient number, since it is larger than the sum of its proper divisors (126841153).

242151231 is a wasteful number, since it uses less digits than its factorization.

242151231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11531021.

The product of its digits is 480, while the sum is 21.

The square root of 242151231 is about 15561.2091753822. The cubic root of 242151231 is about 623.2977517572.

The spelling of 242151231 in words is "two hundred forty-two million, one hundred fifty-one thousand, two hundred thirty-one".