561227851 has 4 divisors (see below), whose sum is σ = 594241272. Its totient is φ = 528214432.

The previous prime is 561227839. The next prime is 561227861. The reversal of 561227851 is 158722165.

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

It is a cyclic number.

It is not a de Polignac number, because 561227851 - 2¹⁵ = 561195083 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 561227851.

It is not an unprimeable number, because it can be changed into a prime (561227831) 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, 16506685 + ... + 16506718.

It is an arithmetic number, because the mean of its divisors is an integer number (148560318).

Almost surely, 2^561227851 is an apocalyptic number.

561227851 is a deficient number, since it is larger than the sum of its proper divisors (33013421).

561227851 is a wasteful number, since it uses less digits than its factorization.

561227851 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33013420.

The product of its digits is 33600, while the sum is 37.

The square root of 561227851 is about 23690.2480147423. The cubic root of 561227851 is about 824.8590397674.

The spelling of 561227851 in words is "five hundred sixty-one million, two hundred twenty-seven thousand, eight hundred fifty-one".