51451087 has 2 divisors, whose sum is σ = 51451088. Its totient is φ = 51451086.

The previous prime is 51451039. The next prime is 51451111. The reversal of 51451087 is 78015415.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 51451087 - 2¹¹ = 51449039 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51451987) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25725543 + 25725544.

It is an arithmetic number, because the mean of its divisors is an integer number (25725544).

Almost surely, 2^51451087 is an apocalyptic number.

51451087 is a deficient number, since it is larger than the sum of its proper divisors (1).

51451087 is an equidigital number, since it uses as much as digits as its factorization.

51451087 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5600, while the sum is 31.

The square root of 51451087 is about 7172.9413074415. The cubic root of 51451087 is about 371.9331184922.

The spelling of 51451087 in words is "fifty-one million, four hundred fifty-one thousand, eighty-seven".