51550007 has 2 divisors, whose sum is σ = 51550008. Its totient is φ = 51550006.

The previous prime is 51549959. The next prime is 51550013. The reversal of 51550007 is 70005515.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 51550007 - 2¹² = 51545911 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51550027) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25775003 + 25775004.

It is an arithmetic number, because the mean of its divisors is an integer number (25775004).

Almost surely, 2^51550007 is an apocalyptic number.

51550007 is a deficient number, since it is larger than the sum of its proper divisors (1).

51550007 is an equidigital number, since it uses as much as digits as its factorization.

51550007 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 875, while the sum is 23.

The square root of 51550007 is about 7179.8333546121. The cubic root of 51550007 is about 372.1713257736.

The spelling of 51550007 in words is "fifty-one million, five hundred fifty thousand, seven".