42199951 has 2 divisors, whose sum is σ = 42199952. Its totient is φ = 42199950.

The previous prime is 42199919. The next prime is 42199987. The reversal of 42199951 is 15999124.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 42199951 - 2⁵ = 42199919 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42199051) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21099975 + 21099976.

It is an arithmetic number, because the mean of its divisors is an integer number (21099976).

Almost surely, 2^42199951 is an apocalyptic number.

42199951 is a deficient number, since it is larger than the sum of its proper divisors (1).

42199951 is an equidigital number, since it uses as much as digits as its factorization.

42199951 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 29160, while the sum is 40.

The square root of 42199951 is about 6496.1489361005. The cubic root of 42199951 is about 348.1534065138.

The spelling of 42199951 in words is "forty-two million, one hundred ninety-nine thousand, nine hundred fifty-one".