42354531 has 12 divisors (see below), whose sum is σ = 64777752. Its totient is φ = 26575296.

The previous prime is 42354491. The next prime is 42354583. The reversal of 42354531 is 13545324.

It is not a de Polignac number, because 42354531 - 2⁶ = 42354467 is a prime.

It is a super-2 number, since 2×42354531² = 3587812592459922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 42354495 and 42354504.

It is not an unprimeable number, because it can be changed into a prime (42354031) 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, 138261 + ... + 138566.

It is an arithmetic number, because the mean of its divisors is an integer number (5398146).

Almost surely, 2^42354531 is an apocalyptic number.

42354531 is a deficient number, since it is larger than the sum of its proper divisors (22423221).

42354531 is a wasteful number, since it uses less digits than its factorization.

42354531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 276850 (or 276847 counting only the distinct ones).

The product of its digits is 7200, while the sum is 27.

The square root of 42354531 is about 6508.0358788194. The cubic root of 42354531 is about 348.5779881686.

Adding to 42354531 its reverse (13545324), we get a palindrome (55899855).

The spelling of 42354531 in words is "forty-two million, three hundred fifty-four thousand, five hundred thirty-one".