561153503 has 2 divisors, whose sum is σ = 561153504. Its totient is φ = 561153502.

The previous prime is 561153487. The next prime is 561153521. The reversal of 561153503 is 305351165.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 561153503 - 2⁴ = 561153487 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (561153553) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 280576751 + 280576752.

It is an arithmetic number, because the mean of its divisors is an integer number (280576752).

Almost surely, 2^561153503 is an apocalyptic number.

561153503 is a deficient number, since it is larger than the sum of its proper divisors (1).

561153503 is an equidigital number, since it uses as much as digits as its factorization.

561153503 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6750, while the sum is 29.

The square root of 561153503 is about 23688.6787938880. The cubic root of 561153503 is about 824.8226140816.

The spelling of 561153503 in words is "five hundred sixty-one million, one hundred fifty-three thousand, five hundred three".