561400501 has 2 divisors, whose sum is σ = 561400502. Its totient is φ = 561400500.

The previous prime is 561400487. The next prime is 561400559. The reversal of 561400501 is 105004165.

561400501 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 508547601 + 52852900 = 22551^2 + 7270^2 .

It is a cyclic number.

It is not a de Polignac number, because 561400501 - 2⁹ = 561399989 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (561400601) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 280700250 + 280700251.

It is an arithmetic number, because the mean of its divisors is an integer number (280700251).

Almost surely, 2^561400501 is an apocalyptic number.

It is an amenable number.

561400501 is a deficient number, since it is larger than the sum of its proper divisors (1).

561400501 is an equidigital number, since it uses as much as digits as its factorization.

561400501 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 600, while the sum is 22.

The square root of 561400501 is about 23693.8916389858. The cubic root of 561400501 is about 824.9436146343.

Adding to 561400501 its reverse (105004165), we get a palindrome (666404666).

The spelling of 561400501 in words is "five hundred sixty-one million, four hundred thousand, five hundred one".