42415551 has 12 divisors (see below), whose sum is σ = 61464312. Its totient is φ = 28185936.

The previous prime is 42415523. The next prime is 42415577. The reversal of 42415551 is 15551424.

It is not a de Polignac number, because 42415551 - 2⁹ = 42415039 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42416551) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4581 + ... + 10286.

It is an arithmetic number, because the mean of its divisors is an integer number (5122026).

Almost surely, 2^42415551 is an apocalyptic number.

42415551 is a deficient number, since it is larger than the sum of its proper divisors (19048761).

42415551 is a wasteful number, since it uses less digits than its factorization.

42415551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15190 (or 15187 counting only the distinct ones).

The product of its digits is 4000, while the sum is 27.

The square root of 42415551 is about 6512.7222418893. The cubic root of 42415551 is about 348.7453061379.

Adding to 42415551 its reverse (15551424), we get a palindrome (57966975).

The spelling of 42415551 in words is "forty-two million, four hundred fifteen thousand, five hundred fifty-one".