5551532551 has 2 divisors, whose sum is σ = 5551532552. Its totient is φ = 5551532550.

The previous prime is 5551532549. The next prime is 5551532573. The reversal of 5551532551 is 1552351555.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 5551532551 - 2¹ = 5551532549 is a prime.

Together with 5551532549, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 5551532551.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5551532521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2775766275 + 2775766276.

It is an arithmetic number, because the mean of its divisors is an integer number (2775766276).

Almost surely, 2^5551532551 is an apocalyptic number.

5551532551 is a deficient number, since it is larger than the sum of its proper divisors (1).

5551532551 is an equidigital number, since it uses as much as digits as its factorization.

5551532551 is an evil number, because the sum of its binary digits is even.

The product of its digits is 93750, while the sum is 37.

The square root of 5551532551 is about 74508.6072276217. The cubic root of 5551532551 is about 1770.6700040443.

The spelling of 5551532551 in words is "five billion, five hundred fifty-one million, five hundred thirty-two thousand, five hundred fifty-one".