51469487 has 2 divisors, whose sum is σ = 51469488. Its totient is φ = 51469486.

The previous prime is 51469477. The next prime is 51469513. The reversal of 51469487 is 78496415.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 51469487 - 2¹² = 51465391 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51469477) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25734743 + 25734744.

It is an arithmetic number, because the mean of its divisors is an integer number (25734744).

Almost surely, 2^51469487 is an apocalyptic number.

51469487 is a deficient number, since it is larger than the sum of its proper divisors (1).

51469487 is an equidigital number, since it uses as much as digits as its factorization.

51469487 is an evil number, because the sum of its binary digits is even.

The product of its digits is 241920, while the sum is 44.

The square root of 51469487 is about 7174.2237907665. The cubic root of 51469487 is about 371.9774502653.

The spelling of 51469487 in words is "fifty-one million, four hundred sixty-nine thousand, four hundred eighty-seven".