242156731 has 2 divisors, whose sum is σ = 242156732. Its totient is φ = 242156730.

The previous prime is 242156671. The next prime is 242156753. The reversal of 242156731 is 137651242.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 242156731 - 2⁹ = 242156219 is a prime.

It is a super-2 number, since 2×242156731² = 117279764737212722, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 242156693 and 242156702.

It is not a weakly prime, because it can be changed into another prime (242136731) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121078365 + 121078366.

It is an arithmetic number, because the mean of its divisors is an integer number (121078366).

Almost surely, 2^242156731 is an apocalyptic number.

242156731 is a deficient number, since it is larger than the sum of its proper divisors (1).

242156731 is an equidigital number, since it uses as much as digits as its factorization.

242156731 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10080, while the sum is 31.

The square root of 242156731 is about 15561.3858958642. The cubic root of 242156731 is about 623.3024707252.

The spelling of 242156731 in words is "two hundred forty-two million, one hundred fifty-six thousand, seven hundred thirty-one".