281552461 has 2 divisors, whose sum is σ = 281552462. Its totient is φ = 281552460.

The previous prime is 281552449. The next prime is 281552477. The reversal of 281552461 is 164255182.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 278556100 + 2996361 = 16690^2 + 1731^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-281552461 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (281582461) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 140776230 + 140776231.

It is an arithmetic number, because the mean of its divisors is an integer number (140776231).

Almost surely, 2^281552461 is an apocalyptic number.

It is an amenable number.

281552461 is a deficient number, since it is larger than the sum of its proper divisors (1).

281552461 is an equidigital number, since it uses as much as digits as its factorization.

281552461 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 19200, while the sum is 34.

The square root of 281552461 is about 16779.5250528732. The cubic root of 281552461 is about 655.4201302060.

The spelling of 281552461 in words is "two hundred eighty-one million, five hundred fifty-two thousand, four hundred sixty-one".