5651561244231 has 24 divisors (see below), whose sum is σ = 9735194526720. Its totient is φ = 3089052107856.

The previous prime is 5651561244227. The next prime is 5651561244397. The reversal of 5651561244231 is 1324421651565.

5651561244231 is a `hidden beast` number, since 5 + 6 + 5 + 1 + 5 + 612 + 4 + 4 + 23 + 1 = 666.

It is not a de Polignac number, because 5651561244231 - 2² = 5651561244227 is a prime.

It is a super-2 number, since 2×5651561244231² (a number of 26 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5651561244211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1950157711 + ... + 1950160608.

It is an arithmetic number, because the mean of its divisors is an integer number (405633105280).

Almost surely, 2^{5651561244231} is an apocalyptic number.

5651561244231 is a deficient number, since it is larger than the sum of its proper divisors (4083633282489).

5651561244231 is a wasteful number, since it uses less digits than its factorization.

5651561244231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3900318355 (or 3900318352 counting only the distinct ones).

The product of its digits is 864000, while the sum is 45.

Adding to 5651561244231 its reverse (1324421651565), we get a palindrome (6975982895796).

The spelling of 5651561244231 in words is "five trillion, six hundred fifty-one billion, five hundred sixty-one million, two hundred forty-four thousand, two hundred thirty-one".