51881567 has 2 divisors, whose sum is σ = 51881568. Its totient is φ = 51881566.

The previous prime is 51881527. The next prime is 51881573. The reversal of 51881567 is 76518815.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 51881567 - 2¹² = 51877471 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51881527) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25940783 + 25940784.

It is an arithmetic number, because the mean of its divisors is an integer number (25940784).

Almost surely, 2^51881567 is an apocalyptic number.

51881567 is a deficient number, since it is larger than the sum of its proper divisors (1).

51881567 is an equidigital number, since it uses as much as digits as its factorization.

51881567 is an evil number, because the sum of its binary digits is even.

The product of its digits is 67200, while the sum is 41.

The square root of 51881567 is about 7202.8860188122. The cubic root of 51881567 is about 372.9675332977.

The spelling of 51881567 in words is "fifty-one million, eight hundred eighty-one thousand, five hundred sixty-seven".