425521510251 has 4 divisors (see below), whose sum is σ = 567362013672. Its totient is φ = 283681006832.

The previous prime is 425521510201. The next prime is 425521510277. The reversal of 425521510251 is 152015125524.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 425521510251 - 2⁷ = 425521510123 is a prime.

It is not an unprimeable number, because it can be changed into a prime (425521510201) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 70920251706 + ... + 70920251711.

It is an arithmetic number, because the mean of its divisors is an integer number (141840503418).

Almost surely, 2^425521510251 is an apocalyptic number.

425521510251 is a deficient number, since it is larger than the sum of its proper divisors (141840503421).

425521510251 is a wasteful number, since it uses less digits than its factorization.

425521510251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 141840503420.

The product of its (nonzero) digits is 20000, while the sum is 33.

Adding to 425521510251 its reverse (152015125524), we get a palindrome (577536635775).

The spelling of 425521510251 in words is "four hundred twenty-five billion, five hundred twenty-one million, five hundred ten thousand, two hundred fifty-one".