561541403 has 2 divisors, whose sum is σ = 561541404. Its totient is φ = 561541402.

The previous prime is 561541381. The next prime is 561541411. The reversal of 561541403 is 304145165.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 561541403 - 2⁸ = 561541147 is a prime.

It is not a weakly prime, because it can be changed into another prime (561541423) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 280770701 + 280770702.

It is an arithmetic number, because the mean of its divisors is an integer number (280770702).

Almost surely, 2^561541403 is an apocalyptic number.

561541403 is a deficient number, since it is larger than the sum of its proper divisors (1).

561541403 is an equidigital number, since it uses as much as digits as its factorization.

561541403 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7200, while the sum is 29.

The square root of 561541403 is about 23696.8648348257. The cubic root of 561541403 is about 825.0126244778.

Adding to 561541403 its reverse (304145165), we get a palindrome (865686568).

The spelling of 561541403 in words is "five hundred sixty-one million, five hundred forty-one thousand, four hundred three".