42523130251 has 20 divisors (see below), whose sum is σ = 51635903152. Its totient is φ = 34303902336.

The previous prime is 42523130203. The next prime is 42523130269. The reversal of 42523130251 is 15203132524.

It is not a de Polignac number, because 42523130251 - 2¹⁷ = 42522999179 is a prime.

It is a super-2 number, since 2×42523130251² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42523130851) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 548281 + ... + 621013.

Almost surely, 2^42523130251 is an apocalyptic number.

42523130251 is a deficient number, since it is larger than the sum of its proper divisors (9112772901).

42523130251 is an frugal number, since it uses more digits than its factorization.

42523130251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72808 (or 72757 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 28.

Adding to 42523130251 its reverse (15203132524), we get a palindrome (57726262775).

The spelling of 42523130251 in words is "forty-two billion, five hundred twenty-three million, one hundred thirty thousand, two hundred fifty-one".