51951859 has 2 divisors, whose sum is σ = 51951860. Its totient is φ = 51951858.

The previous prime is 51951853. The next prime is 51951883. The reversal of 51951859 is 95815915.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 51951859 - 2¹¹ = 51949811 is a prime.

It is not a weakly prime, because it can be changed into another prime (51951853) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25975929 + 25975930.

It is an arithmetic number, because the mean of its divisors is an integer number (25975930).

Almost surely, 2^51951859 is an apocalyptic number.

51951859 is a deficient number, since it is larger than the sum of its proper divisors (1).

51951859 is an equidigital number, since it uses as much as digits as its factorization.

51951859 is an evil number, because the sum of its binary digits is even.

The product of its digits is 81000, while the sum is 43.

The square root of 51951859 is about 7207.7638002365. The cubic root of 51951859 is about 373.1358962594.

The spelling of 51951859 in words is "fifty-one million, nine hundred fifty-one thousand, eight hundred fifty-nine".