51680641 has 2 divisors, whose sum is σ = 51680642. Its totient is φ = 51680640.

The previous prime is 51680633. The next prime is 51680653. The reversal of 51680641 is 14608615.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 37271025 + 14409616 = 6105^2 + 3796^2 .

It is a cyclic number.

It is not a de Polignac number, because 51680641 - 2³ = 51680633 is a prime.

It is not a weakly prime, because it can be changed into another prime (51630641) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25840320 + 25840321.

It is an arithmetic number, because the mean of its divisors is an integer number (25840321).

Almost surely, 2^51680641 is an apocalyptic number.

It is an amenable number.

51680641 is a deficient number, since it is larger than the sum of its proper divisors (1).

51680641 is an equidigital number, since it uses as much as digits as its factorization.

51680641 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5760, while the sum is 31.

The square root of 51680641 is about 7188.9248848489. The cubic root of 51680641 is about 372.4854364229.

The spelling of 51680641 in words is "fifty-one million, six hundred eighty thousand, six hundred forty-one".