42251539829 has 2 divisors, whose sum is σ = 42251539830. Its totient is φ = 42251539828.

The previous prime is 42251539789. The next prime is 42251539877. The reversal of 42251539829 is 92893515224.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 40832284900 + 1419254929 = 202070^2 + 37673^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42251539829 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42251535829) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21125769914 + 21125769915.

It is an arithmetic number, because the mean of its divisors is an integer number (21125769915).

Almost surely, 2^42251539829 is an apocalyptic number.

It is an amenable number.

42251539829 is a deficient number, since it is larger than the sum of its proper divisors (1).

42251539829 is an equidigital number, since it uses as much as digits as its factorization.

42251539829 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1555200, while the sum is 50.

The spelling of 42251539829 in words is "forty-two billion, two hundred fifty-one million, five hundred thirty-nine thousand, eight hundred twenty-nine".