51277487 has 2 divisors, whose sum is σ = 51277488. Its totient is φ = 51277486.

The previous prime is 51277459. The next prime is 51277489. The reversal of 51277487 is 78477215.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51277487 is a prime.

Together with 51277489, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51277489) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25638743 + 25638744.

It is an arithmetic number, because the mean of its divisors is an integer number (25638744).

Almost surely, 2^51277487 is an apocalyptic number.

51277487 is a deficient number, since it is larger than the sum of its proper divisors (1).

51277487 is an equidigital number, since it uses as much as digits as its factorization.

51277487 is an evil number, because the sum of its binary digits is even.

The product of its digits is 109760, while the sum is 41.

The square root of 51277487 is about 7160.8300496521. The cubic root of 51277487 is about 371.5143366402.

The spelling of 51277487 in words is "fifty-one million, two hundred seventy-seven thousand, four hundred eighty-seven".