42251623 has 2 divisors, whose sum is σ = 42251624. Its totient is φ = 42251622.

The previous prime is 42251591. The next prime is 42251639. The reversal of 42251623 is 32615224.

42251623 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 42251623 - 2⁵ = 42251591 is a prime.

It is a super-2 number, since 2×42251623² = 3570399292268258, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42251323) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21125811 + 21125812.

It is an arithmetic number, because the mean of its divisors is an integer number (21125812).

Almost surely, 2^42251623 is an apocalyptic number.

42251623 is a deficient number, since it is larger than the sum of its proper divisors (1).

42251623 is an equidigital number, since it uses as much as digits as its factorization.

42251623 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2880, while the sum is 25.

The square root of 42251623 is about 6500.1248449549. The cubic root of 42251623 is about 348.2954481104.

Adding to 42251623 its reverse (32615224), we get a palindrome (74866847).

The spelling of 42251623 in words is "forty-two million, two hundred fifty-one thousand, six hundred twenty-three".