51442871 has 2 divisors, whose sum is σ = 51442872. Its totient is φ = 51442870.

The previous prime is 51442843. The next prime is 51442907. The reversal of 51442871 is 17824415.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 51442871 - 2²² = 47248567 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 (51442271) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25721435 + 25721436.

It is an arithmetic number, because the mean of its divisors is an integer number (25721436).

Almost surely, 2^51442871 is an apocalyptic number.

51442871 is a deficient number, since it is larger than the sum of its proper divisors (1).

51442871 is an equidigital number, since it uses as much as digits as its factorization.

51442871 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8960, while the sum is 32.

The square root of 51442871 is about 7172.3685766977. The cubic root of 51442871 is about 371.9133199784.

The spelling of 51442871 in words is "fifty-one million, four hundred forty-two thousand, eight hundred seventy-one".