268815451 has 2 divisors, whose sum is σ = 268815452. Its totient is φ = 268815450.

The previous prime is 268815431. The next prime is 268815461. The reversal of 268815451 is 154518862.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 268815451 - 2⁹ = 268814939 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (268815431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 134407725 + 134407726.

It is an arithmetic number, because the mean of its divisors is an integer number (134407726).

Almost surely, 2^268815451 is an apocalyptic number.

268815451 is a deficient number, since it is larger than the sum of its proper divisors (1).

268815451 is an equidigital number, since it uses as much as digits as its factorization.

268815451 is an evil number, because the sum of its binary digits is even.

The product of its digits is 76800, while the sum is 40.

The square root of 268815451 is about 16395.5924260150. The cubic root of 268815451 is about 645.3838237910.

The spelling of 268815451 in words is "two hundred sixty-eight million, eight hundred fifteen thousand, four hundred fifty-one".