234451561 has 2 divisors, whose sum is σ = 234451562. Its totient is φ = 234451560.

The previous prime is 234451537. The next prime is 234451577. The reversal of 234451561 is 165154432.

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., 186841561 + 47610000 = 13669^2 + 6900^2 .

It is a cyclic number.

It is not a de Polignac number, because 234451561 - 2²³ = 226062953 is a prime.

It is not a weakly prime, because it can be changed into another prime (234451661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 117225780 + 117225781.

It is an arithmetic number, because the mean of its divisors is an integer number (117225781).

Almost surely, 2^234451561 is an apocalyptic number.

It is an amenable number.

234451561 is a deficient number, since it is larger than the sum of its proper divisors (1).

234451561 is an equidigital number, since it uses as much as digits as its factorization.

234451561 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 14400, while the sum is 31.

The square root of 234451561 is about 15311.8111600163. The cubic root of 234451561 is about 616.6201457317.

The spelling of 234451561 in words is "two hundred thirty-four million, four hundred fifty-one thousand, five hundred sixty-one".