42418831 has 24 divisors (see below), whose sum is σ = 54812160. Its totient is φ = 32082336.

The previous prime is 42418829. The next prime is 42418841. The reversal of 42418831 is 13881424.

It is not a de Polignac number, because 42418831 - 2¹ = 42418829 is a prime.

It is a super-2 number, since 2×42418831² = 3598714446813122, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 42418793 and 42418802.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42418801) 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, 26430 + ... + 27988.

It is an arithmetic number, because the mean of its divisors is an integer number (2283840).

Almost surely, 2^42418831 is an apocalyptic number.

42418831 is a deficient number, since it is larger than the sum of its proper divisors (12393329).

42418831 is a wasteful number, since it uses less digits than its factorization.

42418831 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1615 (or 1602 counting only the distinct ones).

The product of its digits is 6144, while the sum is 31.

The square root of 42418831 is about 6512.9740518445. The cubic root of 42418831 is about 348.7542954126.

The spelling of 42418831 in words is "forty-two million, four hundred eighteen thousand, eight hundred thirty-one".