561251847 has 8 divisors (see below), whose sum is σ = 805900144. Its totient is φ = 345385728.

The previous prime is 561251833. The next prime is 561251857. The reversal of 561251847 is 748152165.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 561251847 - 2⁶ = 561251783 is a prime.

It is a super-2 number, since 2×561251847² = 630007271521822818, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (39), and also a Moran number because the ratio is a prime number: 14391073 = 561251847 / (5 + 6 + 1 + 2 + 5 + 1 + 8 + 4 + 7).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (561251857) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7195498 + ... + 7195575.

It is an arithmetic number, because the mean of its divisors is an integer number (100737518).

Almost surely, 2^561251847 is an apocalyptic number.

561251847 is a deficient number, since it is larger than the sum of its proper divisors (244648297).

561251847 is a wasteful number, since it uses less digits than its factorization.

561251847 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14391089.

The product of its digits is 67200, while the sum is 39.

The square root of 561251847 is about 23690.7544624480. The cubic root of 561251847 is about 824.8707955605.

The spelling of 561251847 in words is "five hundred sixty-one million, two hundred fifty-one thousand, eight hundred forty-seven".