242191315 has 4 divisors (see below), whose sum is σ = 290629584. Its totient is φ = 193753048.

The previous prime is 242191303. The next prime is 242191319. The reversal of 242191315 is 513191242.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 513191242 = 2 ⋅256595621.

It is a cyclic number.

It is not a de Polignac number, because 242191315 - 2¹⁵ = 242158547 is a prime.

It is a super-2 number, since 2×242191315² = 117313266122858450, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (242191319) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24219127 + ... + 24219136.

It is an arithmetic number, because the mean of its divisors is an integer number (72657396).

Almost surely, 2^242191315 is an apocalyptic number.

242191315 is a deficient number, since it is larger than the sum of its proper divisors (48438269).

242191315 is an equidigital number, since it uses as much as digits as its factorization.

242191315 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48438268.

The product of its digits is 2160, while the sum is 28.

The square root of 242191315 is about 15562.4970682728. The cubic root of 242191315 is about 623.3321419584.

The spelling of 242191315 in words is "two hundred forty-two million, one hundred ninety-one thousand, three hundred fifteen".