51046649 has 2 divisors, whose sum is σ = 51046650. Its totient is φ = 51046648.

The previous prime is 51046627. The next prime is 51046663. The reversal of 51046649 is 94664015.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 28815424 + 22231225 = 5368^2 + 4715^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51046649 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (51046609) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25523324 + 25523325.

It is an arithmetic number, because the mean of its divisors is an integer number (25523325).

Almost surely, 2^51046649 is an apocalyptic number.

It is an amenable number.

51046649 is a deficient number, since it is larger than the sum of its proper divisors (1).

51046649 is an equidigital number, since it uses as much as digits as its factorization.

51046649 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 25920, while the sum is 35.

The square root of 51046649 is about 7144.6937653058. The cubic root of 51046649 is about 370.9560107971.

The spelling of 51046649 in words is "fifty-one million, forty-six thousand, six hundred forty-nine".