51623941 has 2 divisors, whose sum is σ = 51623942. Its totient is φ = 51623940.

The previous prime is 51623939. The next prime is 51623947. The reversal of 51623941 is 14932615.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 50908225 + 715716 = 7135^2 + 846^2 .

It is a cyclic number.

It is not a de Polignac number, because 51623941 - 2¹ = 51623939 is a prime.

Together with 51623939, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51623947) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25811970 + 25811971.

It is an arithmetic number, because the mean of its divisors is an integer number (25811971).

Almost surely, 2^51623941 is an apocalyptic number.

It is an amenable number.

51623941 is a deficient number, since it is larger than the sum of its proper divisors (1).

51623941 is an equidigital number, since it uses as much as digits as its factorization.

51623941 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6480, while the sum is 31.

The square root of 51623941 is about 7184.9802365769. The cubic root of 51623941 is about 372.3491658436.

The spelling of 51623941 in words is "fifty-one million, six hundred twenty-three thousand, nine hundred forty-one".