51964513 has 2 divisors, whose sum is σ = 51964514. Its totient is φ = 51964512.

The previous prime is 51964477. The next prime is 51964531. The reversal of 51964513 is 31546915.

Together with next prime (51964531) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 49956624 + 2007889 = 7068^2 + 1417^2 .

It is a cyclic number.

It is not a de Polignac number, because 51964513 - 2⁹ = 51964001 is a prime.

It is a super-2 number, since 2×51964513² = 5400621222654338, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (51964543) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25982256 + 25982257.

It is an arithmetic number, because the mean of its divisors is an integer number (25982257).

Almost surely, 2^51964513 is an apocalyptic number.

It is an amenable number.

51964513 is a deficient number, since it is larger than the sum of its proper divisors (1).

51964513 is an equidigital number, since it uses as much as digits as its factorization.

51964513 is an evil number, because the sum of its binary digits is even.

The product of its digits is 16200, while the sum is 34.

The square root of 51964513 is about 7208.6415502506. The cubic root of 51964513 is about 373.1661889087.

The spelling of 51964513 in words is "fifty-one million, nine hundred sixty-four thousand, five hundred thirteen".