42332531 has 4 divisors (see below), whose sum is σ = 43131312. Its totient is φ = 41533752.

The previous prime is 42332527. The next prime is 42332561. The reversal of 42332531 is 13523324.

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

It is a cyclic number.

It is not a de Polignac number, because 42332531 - 2² = 42332527 is a prime.

It is a super-2 number, since 2×42332531² = 3584086361731922, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 42332497 and 42332506.

It is not an unprimeable number, because it can be changed into a prime (42332501) 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, 399311 + ... + 399416.

It is an arithmetic number, because the mean of its divisors is an integer number (10782828).

Almost surely, 2^42332531 is an apocalyptic number.

42332531 is a deficient number, since it is larger than the sum of its proper divisors (798781).

42332531 is an equidigital number, since it uses as much as digits as its factorization.

42332531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 798780.

The product of its digits is 2160, while the sum is 23.

The square root of 42332531 is about 6506.3454411828. The cubic root of 42332531 is about 348.5176243482.

Adding to 42332531 its reverse (13523324), we get a palindrome (55855855).

The spelling of 42332531 in words is "forty-two million, three hundred thirty-two thousand, five hundred thirty-one".