42531455 has 4 divisors (see below), whose sum is σ = 51037752. Its totient is φ = 34025160.

The previous prime is 42531451. The next prime is 42531469. The reversal of 42531455 is 55413524.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 42531455 - 2² = 42531451 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42531451) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4253141 + ... + 4253150.

It is an arithmetic number, because the mean of its divisors is an integer number (12759438).

Almost surely, 2^42531455 is an apocalyptic number.

42531455 is a deficient number, since it is larger than the sum of its proper divisors (8506297).

42531455 is an equidigital number, since it uses as much as digits as its factorization.

42531455 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8506296.

The product of its digits is 12000, while the sum is 29.

The square root of 42531455 is about 6521.6144473589. The cubic root of 42531455 is about 349.0626756947.

Adding to 42531455 its reverse (55413524), we get a palindrome (97944979).

The spelling of 42531455 in words is "forty-two million, five hundred thirty-one thousand, four hundred fifty-five".