51601559 has 2 divisors, whose sum is σ = 51601560. Its totient is φ = 51601558.

The previous prime is 51601553. The next prime is 51601567. The reversal of 51601559 is 95510615.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51601559 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51601553) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25800779 + 25800780.

It is an arithmetic number, because the mean of its divisors is an integer number (25800780).

Almost surely, 2^51601559 is an apocalyptic number.

51601559 is a deficient number, since it is larger than the sum of its proper divisors (1).

51601559 is an equidigital number, since it uses as much as digits as its factorization.

51601559 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6750, while the sum is 32.

The square root of 51601559 is about 7183.4225129808. The cubic root of 51601559 is about 372.2953463458.

The spelling of 51601559 in words is "fifty-one million, six hundred one thousand, five hundred fifty-nine".