42251538811 has 2 divisors, whose sum is σ = 42251538812. Its totient is φ = 42251538810.

The previous prime is 42251538793. The next prime is 42251538839. The reversal of 42251538811 is 11883515224.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 42251538811 - 2¹³ = 42251530619 is a prime.

It is not a weakly prime, because it can be changed into another prime (42251538851) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21125769405 + 21125769406.

It is an arithmetic number, because the mean of its divisors is an integer number (21125769406).

Almost surely, 2^42251538811 is an apocalyptic number.

42251538811 is a deficient number, since it is larger than the sum of its proper divisors (1).

42251538811 is an equidigital number, since it uses as much as digits as its factorization.

42251538811 is an evil number, because the sum of its binary digits is even.

The product of its digits is 76800, while the sum is 40.

The spelling of 42251538811 in words is "forty-two billion, two hundred fifty-one million, five hundred thirty-eight thousand, eight hundred eleven".