51556607 has 2 divisors, whose sum is σ = 51556608. Its totient is φ = 51556606.

The previous prime is 51556591. The next prime is 51556621. The reversal of 51556607 is 70665515.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 51556607 - 2⁴ = 51556591 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51556667) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25778303 + 25778304.

It is an arithmetic number, because the mean of its divisors is an integer number (25778304).

Almost surely, 2^51556607 is an apocalyptic number.

51556607 is a deficient number, since it is larger than the sum of its proper divisors (1).

51556607 is an equidigital number, since it uses as much as digits as its factorization.

51556607 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 31500, while the sum is 35.

The square root of 51556607 is about 7180.2929605971. The cubic root of 51556607 is about 372.1872082540.

The spelling of 51556607 in words is "fifty-one million, five hundred fifty-six thousand, six hundred seven".