42551086 has 4 divisors (see below), whose sum is σ = 63826632. Its totient is φ = 21275542.

The previous prime is 42551057. The next prime is 42551107. The reversal of 42551086 is 68015524.

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

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10637770 + ... + 10637773.

It is an arithmetic number, because the mean of its divisors is an integer number (15956658).

Almost surely, 2^42551086 is an apocalyptic number.

42551086 is a deficient number, since it is larger than the sum of its proper divisors (21275546).

42551086 is a wasteful number, since it uses less digits than its factorization.

42551086 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21275545.

The product of its (nonzero) digits is 9600, while the sum is 31.

The square root of 42551086 is about 6523.1193458345. The cubic root of 42551086 is about 349.1163723872.

The spelling of 42551086 in words is "forty-two million, five hundred fifty-one thousand, eighty-six".