385551121 has 2 divisors, whose sum is σ = 385551122. Its totient is φ = 385551120.

The previous prime is 385551113. The next prime is 385551161. The reversal of 385551121 is 121155583.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 307476225 + 78074896 = 17535^2 + 8836^2 .

It is a cyclic number.

It is not a de Polignac number, because 385551121 - 2³ = 385551113 is a prime.

It is not a weakly prime, because it can be changed into another prime (385551161) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 192775560 + 192775561.

It is an arithmetic number, because the mean of its divisors is an integer number (192775561).

Almost surely, 2^385551121 is an apocalyptic number.

It is an amenable number.

385551121 is a deficient number, since it is larger than the sum of its proper divisors (1).

385551121 is an equidigital number, since it uses as much as digits as its factorization.

385551121 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6000, while the sum is 31.

The square root of 385551121 is about 19635.4557115438. The cubic root of 385551121 is about 727.8255938377.

The spelling of 385551121 in words is "three hundred eighty-five million, five hundred fifty-one thousand, one hundred twenty-one".