42235551 has 6 divisors (see below), whose sum is σ = 61006920. Its totient is φ = 28157028.

The previous prime is 42235517. The next prime is 42235553. The reversal of 42235551 is 15553224.

It is a happy number.

It is not a de Polignac number, because 42235551 - 2¹⁴ = 42219167 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42235553) 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, 2346411 + ... + 2346428.

It is an arithmetic number, because the mean of its divisors is an integer number (10167820).

Almost surely, 2^42235551 is an apocalyptic number.

42235551 is a deficient number, since it is larger than the sum of its proper divisors (18771369).

42235551 is a wasteful number, since it uses less digits than its factorization.

42235551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4692845 (or 4692842 counting only the distinct ones).

The product of its digits is 6000, while the sum is 27.

The square root of 42235551 is about 6498.8884434186. Note that the first 3 decimals coincide. The cubic root of 42235551 is about 348.2512800684.

Adding to 42235551 its reverse (15553224), we get a palindrome (57788775).

It can be divided in two parts, 4 and 2235551, that added together give a triangular number (2235555 = T₂₁₁₄).

The spelling of 42235551 in words is "forty-two million, two hundred thirty-five thousand, five hundred fifty-one".