561429511 has 2 divisors, whose sum is σ = 561429512. Its totient is φ = 561429510.

The previous prime is 561429509. The next prime is 561429541. The reversal of 561429511 is 115924165.

It is a happy number.

561429511 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 is a cyclic number.

It is not a de Polignac number, because 561429511 - 2¹ = 561429509 is a prime.

Together with 561429509, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (561429541) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 280714755 + 280714756.

It is an arithmetic number, because the mean of its divisors is an integer number (280714756).

Almost surely, 2^561429511 is an apocalyptic number.

561429511 is a deficient number, since it is larger than the sum of its proper divisors (1).

561429511 is an equidigital number, since it uses as much as digits as its factorization.

561429511 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10800, while the sum is 34.

The square root of 561429511 is about 23694.5038141760. The cubic root of 561429511 is about 824.9578238616.

The spelling of 561429511 in words is "five hundred sixty-one million, four hundred twenty-nine thousand, five hundred eleven".