42251899 has 2 divisors, whose sum is σ = 42251900. Its totient is φ = 42251898.

The previous prime is 42251893. The next prime is 42251903. The reversal of 42251899 is 99815224.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 42251899 - 2⁹ = 42251387 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (42251893) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21125949 + 21125950.

It is an arithmetic number, because the mean of its divisors is an integer number (21125950).

Almost surely, 2^42251899 is an apocalyptic number.

42251899 is a deficient number, since it is larger than the sum of its proper divisors (1).

42251899 is an equidigital number, since it uses as much as digits as its factorization.

42251899 is an evil number, because the sum of its binary digits is even.

The product of its digits is 51840, while the sum is 40.

The square root of 42251899 is about 6500.1460752817. The cubic root of 42251899 is about 348.2962064981.

The spelling of 42251899 in words is "forty-two million, two hundred fifty-one thousand, eight hundred ninety-nine".