242781853 has 2 divisors, whose sum is σ = 242781854. Its totient is φ = 242781852.

The previous prime is 242781821. The next prime is 242781857. The reversal of 242781853 is 358187242.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 199459129 + 43322724 = 14123^2 + 6582^2 .

It is a cyclic number.

It is not a de Polignac number, because 242781853 - 2⁵ = 242781821 is a prime.

It is a super-2 number, since 2×242781853² = 117886056292227218, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (242781857) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121390926 + 121390927.

It is an arithmetic number, because the mean of its divisors is an integer number (121390927).

Almost surely, 2^242781853 is an apocalyptic number.

It is an amenable number.

242781853 is a deficient number, since it is larger than the sum of its proper divisors (1).

242781853 is an equidigital number, since it uses as much as digits as its factorization.

242781853 is an evil number, because the sum of its binary digits is even.

The product of its digits is 107520, while the sum is 40.

The square root of 242781853 is about 15581.4586287677. The cubic root of 242781853 is about 623.8383568339.

The spelling of 242781853 in words is "two hundred forty-two million, seven hundred eighty-one thousand, eight hundred fifty-three".