51614681 has 2 divisors, whose sum is σ = 51614682. Its totient is φ = 51614680.

The previous prime is 51614677. The next prime is 51614687. The reversal of 51614681 is 18641615.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 43349056 + 8265625 = 6584^2 + 2875^2 .

It is a cyclic number.

It is not a de Polignac number, because 51614681 - 2² = 51614677 is a prime.

It is a super-2 number, since 2×51614681² = 5328150589463522, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (51614687) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25807340 + 25807341.

It is an arithmetic number, because the mean of its divisors is an integer number (25807341).

Almost surely, 2^51614681 is an apocalyptic number.

It is an amenable number.

51614681 is a deficient number, since it is larger than the sum of its proper divisors (1).

51614681 is an equidigital number, since it uses as much as digits as its factorization.

51614681 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5760, while the sum is 32.

The square root of 51614681 is about 7184.3358078531. The cubic root of 51614681 is about 372.3269012419.

The spelling of 51614681 in words is "fifty-one million, six hundred fourteen thousand, six hundred eighty-one".