51551567 has 2 divisors, whose sum is σ = 51551568. Its totient is φ = 51551566.

The previous prime is 51551557. The next prime is 51551573. The reversal of 51551567 is 76515515.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 51551567 - 2²² = 47357263 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51551537) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25775783 + 25775784.

It is an arithmetic number, because the mean of its divisors is an integer number (25775784).

Almost surely, 2^51551567 is an apocalyptic number.

51551567 is a deficient number, since it is larger than the sum of its proper divisors (1).

51551567 is an equidigital number, since it uses as much as digits as its factorization.

51551567 is an evil number, because the sum of its binary digits is even.

The product of its digits is 26250, while the sum is 35.

The square root of 51551567 is about 7179.9419914091. The cubic root of 51551567 is about 372.1750799368.

The spelling of 51551567 in words is "fifty-one million, five hundred fifty-one thousand, five hundred sixty-seven".