51623417 has 2 divisors, whose sum is σ = 51623418. Its totient is φ = 51623416.

The previous prime is 51623413. The next prime is 51623443. The reversal of 51623417 is 71432615.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 41229241 + 10394176 = 6421^2 + 3224^2 .

It is a cyclic number.

It is not a de Polignac number, because 51623417 - 2² = 51623413 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 51623417.

It is not a weakly prime, because it can be changed into another prime (51623413) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25811708 + 25811709.

It is an arithmetic number, because the mean of its divisors is an integer number (25811709).

Almost surely, 2^51623417 is an apocalyptic number.

It is an amenable number.

51623417 is a deficient number, since it is larger than the sum of its proper divisors (1).

51623417 is an equidigital number, since it uses as much as digits as its factorization.

51623417 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5040, while the sum is 29.

The square root of 51623417 is about 7184.9437715267. The cubic root of 51623417 is about 372.3479060171.

The spelling of 51623417 in words is "fifty-one million, six hundred twenty-three thousand, four hundred seventeen".