55651786231 has 2 divisors, whose sum is σ = 55651786232. Its totient is φ = 55651786230.

The previous prime is 55651786189. The next prime is 55651786237. The reversal of 55651786231 is 13268715655.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 55651786231 - 2⁹ = 55651785719 is a prime.

It is a super-2 number, since 2×55651786231² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55651786237) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27825893115 + 27825893116.

It is an arithmetic number, because the mean of its divisors is an integer number (27825893116).

Almost surely, 2^55651786231 is an apocalyptic number.

55651786231 is a deficient number, since it is larger than the sum of its proper divisors (1).

55651786231 is an equidigital number, since it uses as much as digits as its factorization.

55651786231 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1512000, while the sum is 49.

The spelling of 55651786231 in words is "fifty-five billion, six hundred fifty-one million, seven hundred eighty-six thousand, two hundred thirty-one".