42552321 has 16 divisors (see below), whose sum is σ = 65020800. Its totient is φ = 24248448.

The previous prime is 42552313. The next prime is 42552329. The reversal of 42552321 is 12325524.

It is an interprime number because it is at equal distance from previous prime (42552313) and next prime (42552329).

It is not a de Polignac number, because 42552321 - 2³ = 42552313 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 42552291 and 42552300.

It is not an unprimeable number, because it can be changed into a prime (42552329) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5565 + ... + 10773.

It is an arithmetic number, because the mean of its divisors is an integer number (4063800).

Almost surely, 2^42552321 is an apocalyptic number.

It is an amenable number.

42552321 is a deficient number, since it is larger than the sum of its proper divisors (22468479).

42552321 is a wasteful number, since it uses less digits than its factorization.

42552321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5608.

The product of its digits is 2400, while the sum is 24.

The square root of 42552321 is about 6523.2140084471. The cubic root of 42552321 is about 349.1197499316.

Adding to 42552321 its reverse (12325524), we get a palindrome (54877845).

The spelling of 42552321 in words is "forty-two million, five hundred fifty-two thousand, three hundred twenty-one".