561505151 has 2 divisors, whose sum is σ = 561505152. Its totient is φ = 561505150.

The previous prime is 561505117. The next prime is 561505199. The reversal of 561505151 is 151505165.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-561505151 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (561507151) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 280752575 + 280752576.

It is an arithmetic number, because the mean of its divisors is an integer number (280752576).

Almost surely, 2^561505151 is an apocalyptic number.

561505151 is a deficient number, since it is larger than the sum of its proper divisors (1).

561505151 is an equidigital number, since it uses as much as digits as its factorization.

561505151 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3750, while the sum is 29.

The square root of 561505151 is about 23696.0999111668. The cubic root of 561505151 is about 824.9948703691.

The spelling of 561505151 in words is "five hundred sixty-one million, five hundred five thousand, one hundred fifty-one".