242312157 has 24 divisors (see below), whose sum is σ = 354017664. Its totient is φ = 159702624.

The previous prime is 242312143. The next prime is 242312159. The reversal of 242312157 is 751213242.

It is not a de Polignac number, because 242312157 - 2¹⁹ = 241787869 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 242312157.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (242312159) 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 23 ways as a sum of consecutive naturals, for example, 394983 + ... + 395595.

It is an arithmetic number, because the mean of its divisors is an integer number (14750736).

Almost surely, 2^242312157 is an apocalyptic number.

It is an amenable number.

242312157 is a deficient number, since it is larger than the sum of its proper divisors (111705507).

242312157 is a wasteful number, since it uses less digits than its factorization.

242312157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1049 (or 1046 counting only the distinct ones).

The product of its digits is 3360, while the sum is 27.

The square root of 242312157 is about 15566.3790587278. The cubic root of 242312157 is about 623.4357957969.

Adding to 242312157 its reverse (751213242), we get a palindrome (993525399).

The spelling of 242312157 in words is "two hundred forty-two million, three hundred twelve thousand, one hundred fifty-seven".