42551087 has 4 divisors (see below), whose sum is σ = 42989856. Its totient is φ = 42112320.

The previous prime is 42551057. The next prime is 42551107. The reversal of 42551087 is 78015524.

42551087 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 42551087 - 2⁶ = 42551023 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42551057) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 219239 + ... + 219432.

It is an arithmetic number, because the mean of its divisors is an integer number (10747464).

Almost surely, 2^42551087 is an apocalyptic number.

42551087 is a deficient number, since it is larger than the sum of its proper divisors (438769).

42551087 is an equidigital number, since it uses as much as digits as its factorization.

42551087 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 438768.

The product of its (nonzero) digits is 11200, while the sum is 32.

The square root of 42551087 is about 6523.1194224849. The cubic root of 42551087 is about 349.1163751221.

The spelling of 42551087 in words is "forty-two million, five hundred fifty-one thousand, eighty-seven".