242177431 has 2 divisors, whose sum is σ = 242177432. Its totient is φ = 242177430.

The previous prime is 242177407. The next prime is 242177459. The reversal of 242177431 is 134771242.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 242177431 - 2¹⁵ = 242144663 is a prime.

It is a super-2 number, since 2×242177431² = 117299816171519522, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 242177393 and 242177402.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (242177491) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121088715 + 121088716.

It is an arithmetic number, because the mean of its divisors is an integer number (121088716).

Almost surely, 2^242177431 is an apocalyptic number.

242177431 is a deficient number, since it is larger than the sum of its proper divisors (1).

242177431 is an equidigital number, since it uses as much as digits as its factorization.

242177431 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9408, while the sum is 31.

The square root of 242177431 is about 15562.0509895065. The cubic root of 242177431 is about 623.3202305640.

The spelling of 242177431 in words is "two hundred forty-two million, one hundred seventy-seven thousand, four hundred thirty-one".