561551051 has 4 divisors (see below), whose sum is σ = 565320000. Its totient is φ = 557782104.

The previous prime is 561551033. The next prime is 561551069. The reversal of 561551051 is 150155165.

It is a happy number.

561551051 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (561551033) and next prime (561551069).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-561551051 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (561551351) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1884251 + ... + 1884548.

It is an arithmetic number, because the mean of its divisors is an integer number (141330000).

Almost surely, 2^561551051 is an apocalyptic number.

561551051 is a deficient number, since it is larger than the sum of its proper divisors (3768949).

561551051 is a wasteful number, since it uses less digits than its factorization.

561551051 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3768948.

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

The square root of 561551051 is about 23697.0684051846. The cubic root of 561551051 is about 825.0173493750.

The spelling of 561551051 in words is "five hundred sixty-one million, five hundred fifty-one thousand, fifty-one".