51345487 has 2 divisors, whose sum is σ = 51345488. Its totient is φ = 51345486.

The previous prime is 51345473. The next prime is 51345521. The reversal of 51345487 is 78454315.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51345487 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51315487) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25672743 + 25672744.

It is an arithmetic number, because the mean of its divisors is an integer number (25672744).

Almost surely, 2^51345487 is an apocalyptic number.

51345487 is a deficient number, since it is larger than the sum of its proper divisors (1).

51345487 is an equidigital number, since it uses as much as digits as its factorization.

51345487 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 67200, while the sum is 37.

The square root of 51345487 is about 7165.5765294915. The cubic root of 51345487 is about 371.6784880535.

The spelling of 51345487 in words is "fifty-one million, three hundred forty-five thousand, four hundred eighty-seven".