54551531 has 2 divisors, whose sum is σ = 54551532. Its totient is φ = 54551530.

The previous prime is 54551509. The next prime is 54551533. The reversal of 54551531 is 13515545.

54551531 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-54551531 is a prime.

It is a super-2 number, since 2×54551531² = 5951739068887922, which contains 22 as substring.

It is a Sophie Germain prime.

Together with 54551533, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 54551494 and 54551503.

It is not a weakly prime, because it can be changed into another prime (54551533) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27275765 + 27275766.

It is an arithmetic number, because the mean of its divisors is an integer number (27275766).

Almost surely, 2^54551531 is an apocalyptic number.

54551531 is a deficient number, since it is larger than the sum of its proper divisors (1).

54551531 is an equidigital number, since it uses as much as digits as its factorization.

54551531 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7500, while the sum is 29.

The square root of 54551531 is about 7385.9008252210. The cubic root of 54551531 is about 379.2587836781.

The spelling of 54551531 in words is "fifty-four million, five hundred fifty-one thousand, five hundred thirty-one".