378572281 has 2 divisors, whose sum is σ = 378572282. Its totient is φ = 378572280.

The previous prime is 378572273. The next prime is 378572297. The reversal of 378572281 is 182275873.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 313608681 + 64963600 = 17709^2 + 8060^2 .

It is a cyclic number.

It is not a de Polignac number, because 378572281 - 2³ = 378572273 is a prime.

It is a super-2 number, since 2×378572281² = 286633943883085922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (378572221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 189286140 + 189286141.

It is an arithmetic number, because the mean of its divisors is an integer number (189286141).

Almost surely, 2^378572281 is an apocalyptic number.

It is an amenable number.

378572281 is a deficient number, since it is larger than the sum of its proper divisors (1).

378572281 is an equidigital number, since it uses as much as digits as its factorization.

378572281 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 188160, while the sum is 43.

The square root of 378572281 is about 19456.9340082141. The cubic root of 378572281 is about 723.4073837889.

The spelling of 378572281 in words is "three hundred seventy-eight million, five hundred seventy-two thousand, two hundred eighty-one".