42655551 has 8 divisors (see below), whose sum is σ = 59867520. Its totient is φ = 26940312.

The previous prime is 42655541. The next prime is 42655553. The reversal of 42655551 is 15555624.

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

It is not a de Polignac number, because 42655551 - 2⁷ = 42655423 is a prime.

It is a super-2 number, since 2×42655551² = 3638992062227202, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42655553) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 374115 + ... + 374228.

It is an arithmetic number, because the mean of its divisors is an integer number (7483440).

Almost surely, 2^42655551 is an apocalyptic number.

42655551 is a deficient number, since it is larger than the sum of its proper divisors (17211969).

42655551 is a wasteful number, since it uses less digits than its factorization.

42655551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 748365.

The product of its digits is 30000, while the sum is 33.

The square root of 42655551 is about 6531.1217260131. The cubic root of 42655551 is about 349.4018381675.

The spelling of 42655551 in words is "forty-two million, six hundred fifty-five thousand, five hundred fifty-one".