42424551 has 24 divisors (see below), whose sum is σ = 66218880. Its totient is φ = 26018496.

The previous prime is 42424519. The next prime is 42424561. The reversal of 42424551 is 15542424.

It is not a de Polignac number, because 42424551 - 2⁵ = 42424519 is a prime.

It is a super-3 number, since 3×42424551³ (a number of 24 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42424561) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 55665 + ... + 56421.

It is an arithmetic number, because the mean of its divisors is an integer number (2759120).

Almost surely, 2^42424551 is an apocalyptic number.

42424551 is a deficient number, since it is larger than the sum of its proper divisors (23794329).

42424551 is a wasteful number, since it uses less digits than its factorization.

42424551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1255 (or 1252 counting only the distinct ones).

The product of its digits is 6400, while the sum is 27.

The square root of 42424551 is about 6513.4131605480. The cubic root of 42424551 is about 348.7699707221.

Adding to 42424551 its reverse (15542424), we get a palindrome (57966975).

The spelling of 42424551 in words is "forty-two million, four hundred twenty-four thousand, five hundred fifty-one".