51478859 has 2 divisors, whose sum is σ = 51478860. Its totient is φ = 51478858.

The previous prime is 51478837. The next prime is 51478871. The reversal of 51478859 is 95887415.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 51478859 - 2¹² = 51474763 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (51478459) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25739429 + 25739430.

It is an arithmetic number, because the mean of its divisors is an integer number (25739430).

Almost surely, 2^51478859 is an apocalyptic number.

51478859 is a deficient number, since it is larger than the sum of its proper divisors (1).

51478859 is an equidigital number, since it uses as much as digits as its factorization.

51478859 is an evil number, because the sum of its binary digits is even.

The product of its digits is 403200, while the sum is 47.

The square root of 51478859 is about 7174.8769327425. The cubic root of 51478859 is about 372.0000264963. Note that the first 4 decimals are identical.

The spelling of 51478859 in words is "fifty-one million, four hundred seventy-eight thousand, eight hundred fifty-nine".