561354751 has 2 divisors, whose sum is σ = 561354752. Its totient is φ = 561354750.

The previous prime is 561354749. The next prime is 561354763. The reversal of 561354751 is 157453165.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 561354751 - 2¹ = 561354749 is a prime.

Together with 561354749, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 561354751.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (561334751) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 280677375 + 280677376.

It is an arithmetic number, because the mean of its divisors is an integer number (280677376).

Almost surely, 2^561354751 is an apocalyptic number.

561354751 is a deficient number, since it is larger than the sum of its proper divisors (1).

561354751 is an equidigital number, since it uses as much as digits as its factorization.

561354751 is an evil number, because the sum of its binary digits is even.

The product of its digits is 63000, while the sum is 37.

The square root of 561354751 is about 23692.9261806135. The cubic root of 561354751 is about 824.9212050856.

The spelling of 561354751 in words is "five hundred sixty-one million, three hundred fifty-four thousand, seven hundred fifty-one".