51601439 has 2 divisors, whose sum is σ = 51601440. Its totient is φ = 51601438.

The previous prime is 51601427. The next prime is 51601447. The reversal of 51601439 is 93410615.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51601439 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 (51604439) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25800719 + 25800720.

It is an arithmetic number, because the mean of its divisors is an integer number (25800720).

Almost surely, 2^51601439 is an apocalyptic number.

51601439 is a deficient number, since it is larger than the sum of its proper divisors (1).

51601439 is an equidigital number, since it uses as much as digits as its factorization.

51601439 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3240, while the sum is 29.

The square root of 51601439 is about 7183.4141604115. The cubic root of 51601439 is about 372.2950577533.

The spelling of 51601439 in words is "fifty-one million, six hundred one thousand, four hundred thirty-nine".