42523102251 has 20 divisors (see below), whose sum is σ = 72596761072. Its totient is φ = 24298915248.

The previous prime is 42523102241. The next prime is 42523102277. The reversal of 42523102251 is 15220132524.

42523102251 is a `hidden beast` number, since 425 + 2 + 3 + 10 + 225 + 1 = 666.

It is not a de Polignac number, because 42523102251 - 2¹⁵ = 42523069483 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42523102231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 37497760 + ... + 37498893.

Almost surely, 2^42523102251 is an apocalyptic number.

42523102251 is a deficient number, since it is larger than the sum of its proper divisors (30073658821).

42523102251 is an equidigital number, since it uses as much as digits as its factorization.

42523102251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74996672 (or 74996663 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 27.

Adding to 42523102251 its reverse (15220132524), we get a palindrome (57743234775).

The spelling of 42523102251 in words is "forty-two billion, five hundred twenty-three million, one hundred two thousand, two hundred fifty-one".