238801561 has 2 divisors, whose sum is σ = 238801562. Its totient is φ = 238801560.

The previous prime is 238801543. The next prime is 238801609. The reversal of 238801561 is 165108832.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 150798400 + 88003161 = 12280^2 + 9381^2 .

It is a cyclic number.

It is not a de Polignac number, because 238801561 - 2¹⁷ = 238670489 is a prime.

It is not a weakly prime, because it can be changed into another prime (238801531) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 119400780 + 119400781.

It is an arithmetic number, because the mean of its divisors is an integer number (119400781).

Almost surely, 2^238801561 is an apocalyptic number.

It is an amenable number.

238801561 is a deficient number, since it is larger than the sum of its proper divisors (1).

238801561 is an equidigital number, since it uses as much as digits as its factorization.

238801561 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 11520, while the sum is 34.

The square root of 238801561 is about 15453.2055250683. The cubic root of 238801561 is about 620.4103778082.

The spelling of 238801561 in words is "two hundred thirty-eight million, eight hundred one thousand, five hundred sixty-one".