51623413 has 2 divisors, whose sum is σ = 51623414. Its totient is φ = 51623412.

The previous prime is 51623389. The next prime is 51623417. The reversal of 51623413 is 31432615.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 36084049 + 15539364 = 6007^2 + 3942^2 .

It is a cyclic number.

It is not a de Polignac number, because 51623413 - 2¹⁷ = 51492341 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51623417) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25811706 + 25811707.

It is an arithmetic number, because the mean of its divisors is an integer number (25811707).

Almost surely, 2^51623413 is an apocalyptic number.

It is an amenable number.

51623413 is a deficient number, since it is larger than the sum of its proper divisors (1).

51623413 is an equidigital number, since it uses as much as digits as its factorization.

51623413 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2160, while the sum is 25.

The square root of 51623413 is about 7184.9434931668. The cubic root of 51623413 is about 372.3478964001.

The spelling of 51623413 in words is "fifty-one million, six hundred twenty-three thousand, four hundred thirteen".