42556851 has 6 divisors (see below), whose sum is σ = 61471020. Its totient is φ = 28371228.

The previous prime is 42556849. The next prime is 42556853. The reversal of 42556851 is 15865524.

42556851 is a `hidden beast` number, since 42 + 5 + 568 + 51 = 666.

It is an interprime number because it is at equal distance from previous prime (42556849) and next prime (42556853).

It is not a de Polignac number, because 42556851 - 2¹ = 42556849 is a prime.

It is a super-2 number, since 2×42556851² = 3622171134072402, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (42556853) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2364261 + ... + 2364278.

It is an arithmetic number, because the mean of its divisors is an integer number (10245170).

Almost surely, 2^42556851 is an apocalyptic number.

42556851 is a deficient number, since it is larger than the sum of its proper divisors (18914169).

42556851 is a wasteful number, since it uses less digits than its factorization.

42556851 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4728545 (or 4728542 counting only the distinct ones).

The product of its digits is 48000, while the sum is 36.

The square root of 42556851 is about 6523.5612206831. The cubic root of 42556851 is about 349.1321382598.

The spelling of 42556851 in words is "forty-two million, five hundred fifty-six thousand, eight hundred fifty-one".