42199523 has 2 divisors, whose sum is σ = 42199524. Its totient is φ = 42199522.

The previous prime is 42199483. The next prime is 42199529. The reversal of 42199523 is 32599124.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42199523 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (42199529) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21099761 + 21099762.

It is an arithmetic number, because the mean of its divisors is an integer number (21099762).

Almost surely, 2^42199523 is an apocalyptic number.

42199523 is a deficient number, since it is larger than the sum of its proper divisors (1).

42199523 is an equidigital number, since it uses as much as digits as its factorization.

42199523 is an evil number, because the sum of its binary digits is even.

The product of its digits is 19440, while the sum is 35.

The square root of 42199523 is about 6496.1159934225. The cubic root of 42199523 is about 348.1522294970.

The spelling of 42199523 in words is "forty-two million, one hundred ninety-nine thousand, five hundred twenty-three".