55500530251 has 2 divisors, whose sum is σ = 55500530252. Its totient is φ = 55500530250.

The previous prime is 55500530249. The next prime is 55500530287. The reversal of 55500530251 is 15203500555.

It is a happy number.

55500530251 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 55500530251 - 2¹ = 55500530249 is a prime.

It is a super-2 number, since 2×55500530251² (a number of 22 digits) contains 22 as substring.

Together with 55500530249, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (55500530201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27750265125 + 27750265126.

It is an arithmetic number, because the mean of its divisors is an integer number (27750265126).

Almost surely, 2^55500530251 is an apocalyptic number.

55500530251 is a deficient number, since it is larger than the sum of its proper divisors (1).

55500530251 is an equidigital number, since it uses as much as digits as its factorization.

55500530251 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18750, while the sum is 31.

The spelling of 55500530251 in words is "fifty-five billion, five hundred million, five hundred thirty thousand, two hundred fifty-one".