51371487 has 12 divisors (see below), whose sum is σ = 75220704. Its totient is φ = 33778080.

The previous prime is 51371471. The next prime is 51371521. The reversal of 51371487 is 78417315.

It is not a de Polignac number, because 51371487 - 2⁴ = 51371471 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51371387) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 38439 + ... + 39752.

It is an arithmetic number, because the mean of its divisors is an integer number (6268392).

Almost surely, 2^51371487 is an apocalyptic number.

51371487 is a deficient number, since it is larger than the sum of its proper divisors (23849217).

51371487 is a wasteful number, since it uses less digits than its factorization.

51371487 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78270 (or 78267 counting only the distinct ones).

The product of its digits is 23520, while the sum is 36.

The square root of 51371487 is about 7167.3905293349. The cubic root of 51371487 is about 371.7412135274.

The spelling of 51371487 in words is "fifty-one million, three hundred seventy-one thousand, four hundred eighty-seven".