42256551 has 8 divisors (see below), whose sum is σ = 59307520. Its totient is φ = 26688312.

The previous prime is 42256541. The next prime is 42256559. The reversal of 42256551 is 15565224.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 42256551 - 2⁵ = 42256519 is a prime.

It is a super-2 number, since 2×42256551² = 3571232204831202, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42256559) 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 in 7 ways as a sum of consecutive naturals, for example, 370615 + ... + 370728.

It is an arithmetic number, because the mean of its divisors is an integer number (7413440).

Almost surely, 2^42256551 is an apocalyptic number.

42256551 is a deficient number, since it is larger than the sum of its proper divisors (17050969).

42256551 is a wasteful number, since it uses less digits than its factorization.

42256551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 741365.

The product of its digits is 12000, while the sum is 30.

The square root of 42256551 is about 6500.5039035447. The cubic root of 42256551 is about 348.3089886809.

The spelling of 42256551 in words is "forty-two million, two hundred fifty-six thousand, five hundred fifty-one".