42551699 has 2 divisors, whose sum is σ = 42551700. Its totient is φ = 42551698.

The previous prime is 42551687. The next prime is 42551723. The reversal of 42551699 is 99615524.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 42551699 - 2¹⁶ = 42486163 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (42553699) 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, 21275849 + 21275850.

It is an arithmetic number, because the mean of its divisors is an integer number (21275850).

Almost surely, 2^42551699 is an apocalyptic number.

42551699 is a deficient number, since it is larger than the sum of its proper divisors (1).

42551699 is an equidigital number, since it uses as much as digits as its factorization.

42551699 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 97200, while the sum is 41.

The square root of 42551699 is about 6523.1663323880. The cubic root of 42551699 is about 349.1180488607.

The spelling of 42551699 in words is "forty-two million, five hundred fifty-one thousand, six hundred ninety-nine".