42290020251 has 12 divisors (see below), whose sum is σ = 61460345128. Its totient is φ = 28020380544.

The previous prime is 42290020243. The next prime is 42290020291. The reversal of 42290020251 is 15202009224.

It is a happy number.

It is not a de Polignac number, because 42290020251 - 2³ = 42290020243 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42290020291) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 14412310 + ... + 14415243.

Almost surely, 2^42290020251 is an apocalyptic number.

42290020251 is a deficient number, since it is larger than the sum of its proper divisors (19170324877).

42290020251 is a wasteful number, since it uses less digits than its factorization.

42290020251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28827722 (or 28827719 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 27.

Adding to 42290020251 its reverse (15202009224), we get a palindrome (57492029475).

The spelling of 42290020251 in words is "forty-two billion, two hundred ninety million, twenty thousand, two hundred fifty-one".