42533251 has 2 divisors, whose sum is σ = 42533252. Its totient is φ = 42533250.

The previous prime is 42533237. The next prime is 42533273. The reversal of 42533251 is 15233524.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 42533251 - 2¹⁵ = 42500483 is a prime.

It is not a weakly prime, because it can be changed into another prime (42533291) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21266625 + 21266626.

It is an arithmetic number, because the mean of its divisors is an integer number (21266626).

Almost surely, 2^42533251 is an apocalyptic number.

42533251 is a deficient number, since it is larger than the sum of its proper divisors (1).

42533251 is an equidigital number, since it uses as much as digits as its factorization.

42533251 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3600, while the sum is 25.

The square root of 42533251 is about 6521.7521418711. The cubic root of 42533251 is about 349.0675889818.

Adding to 42533251 its reverse (15233524), we get a palindrome (57766775).

The spelling of 42533251 in words is "forty-two million, five hundred thirty-three thousand, two hundred fifty-one".